diff --git a/.gitignore b/.gitignore
index 3e452dd..8cd22e2 100644
--- a/.gitignore
+++ b/.gitignore
@@ -6,8 +6,8 @@ argenta/__pycache__/
 argenta/command/__pycache__
 argenta/command/params/__pycache__
 argenta/command/params/flag/__pycache__
-argenta/command/params/flags_group/__pycache__
-argenta/command/params/input_flag/__pycache__
+argenta/command/params/flag/flags_group/__pycache__
+argenta/command/params/flag/input_flag/__pycache__
 dist
 poetry.lock
 tests/__pycache__
diff --git a/argenta/app/entity.py b/argenta/app/entity.py
index d31447b..37a0dda 100644
--- a/argenta/app/entity.py
+++ b/argenta/app/entity.py
@@ -1,7 +1,7 @@
 from typing import Callable
 from ..command.entity import Command
 from argenta.command.input_comand.entity import InputCommand
-from argenta.command.input_comand.exceptions import InvalidInputFlagsException
+from argenta.command.input_comand.exceptions import InvalidInputFlagException
 from ..router.entity import Router
 from .exceptions import (InvalidRouterInstanceException,
                          InvalidDescriptionMessagePatternException,
@@ -68,26 +68,25 @@ class App:
 
             raw_command: str = input()
             try:
-                command: Command = InputCommand.parse(raw_command=raw_command)
-            except InvalidInputFlagsException:
+                input_command: InputCommand = InputCommand.parse(raw_command=raw_command)
+            except InvalidInputFlagException:
                 self.print_func(self.line_separate)
                 self.print_func(self.command_group_description_separate)
                 if not self.repeat_command_groups:
                     self.print_func(self.prompt)
                 continue
 
-
-            self._checking_command_for_exit_command(command.get_string_entity())
+            self._checking_command_for_exit_command(input_command.get_string_entity())
             self.print_func(self.line_separate)
 
-            is_unknown_command: bool = self._check_is_command_unknown(command.get_string_entity())
+            is_unknown_command: bool = self._check_is_command_unknown(input_command.get_string_entity())
             if is_unknown_command:
                 if not self.repeat_command_groups:
                     self.print_func(self.prompt)
                 continue
 
             for router in self._routers:
-                router.input_command_handler(command)
+                router.input_command_handler(input_command)
 
             self.print_func(self.line_separate)
             self.print_func(self.command_group_description_separate)
@@ -208,7 +207,7 @@ class App:
                     if self.ignore_command_register:
                         return False
                     else:
-                        if command_entity['command'] == command:
+                        if command_entity['command'].get_string_entity() == command:
                             return False
         self._app_main_router.unknown_command_handler(command)
         self.print_func(self.line_separate)
diff --git a/argenta/command/entity.py b/argenta/command/entity.py
index e457a54..1a59f21 100644
--- a/argenta/command/entity.py
+++ b/argenta/command/entity.py
@@ -1,8 +1,9 @@
 from .params.flag.entity import Flag
-from .params.flags_group.entity import FlagsGroup
+from .params.flag.flags_group.entity import FlagsGroup
 from .exceptions import (InvalidCommandInstanceException,
                          InvalidDescriptionInstanceException,
                          InvalidFlagsInstanceException)
+from .params.flag.input_flag.entity import InputFlag
 
 
 class Command:
@@ -13,7 +14,7 @@ class Command:
         self._description = description
         self._flags = flags
 
-        self._input_flags = None
+        self._input_flags: FlagsGroup | None = None
 
     def get_string_entity(self):
         return self._command
@@ -39,3 +40,15 @@ class Command:
         if not (isinstance(self._flags, Flag) or not isinstance(self._flags, FlagsGroup)) or not self._flags is None:
             raise InvalidFlagsInstanceException
 
+    def validate_input_flag(self, flag: InputFlag):
+        registered_flags: FlagsGroup = self._flags
+        if registered_flags:
+            for registered_flag in registered_flags:
+                if registered_flag.get_string_entity() == flag.get_string_entity():
+                    is_valid = registered_flag.validate_input_flag_value(flag)
+                    if is_valid:
+                        return True
+        return False
+
+
+
diff --git a/argenta/command/input_comand/__pycache__/__init__.cpython-313.pyc b/argenta/command/input_comand/__pycache__/__init__.cpython-313.pyc
new file mode 100644
index 0000000..427b945
Binary files /dev/null and b/argenta/command/input_comand/__pycache__/__init__.cpython-313.pyc differ
diff --git a/argenta/command/input_comand/__pycache__/entity.cpython-313.pyc b/argenta/command/input_comand/__pycache__/entity.cpython-313.pyc
new file mode 100644
index 0000000..4484f6b
Binary files /dev/null and b/argenta/command/input_comand/__pycache__/entity.cpython-313.pyc differ
diff --git a/argenta/command/input_comand/__pycache__/exceptions.cpython-313.pyc b/argenta/command/input_comand/__pycache__/exceptions.cpython-313.pyc
new file mode 100644
index 0000000..cf07c72
Binary files /dev/null and b/argenta/command/input_comand/__pycache__/exceptions.cpython-313.pyc differ
diff --git a/argenta/command/input_comand/entity.py b/argenta/command/input_comand/entity.py
index 4d2ed93..db332dc 100644
--- a/argenta/command/input_comand/entity.py
+++ b/argenta/command/input_comand/entity.py
@@ -1,35 +1,40 @@
-from argenta.command.input_comand.exceptions import InvalidInputFlagsException
+from ..input_comand.exceptions import IncorrectInputFlagException
 from ..entity import Command
-from ..params.flags_group.entity import FlagsGroup
-from ..params.input_flag.entity import InputFlag
+from ..params.flag.flags_group.entity import FlagsGroup
+from ..params.flag.input_flag.entity import InputFlag
+
+from typing import Generic, TypeVar
 
 
-class InputCommand(Command):
-    def set_input_flags(self, input_flags: list[InputFlag]):
+T = TypeVar('T')
+
+
+class InputCommand(Command, Generic[T]):
+    def set_input_flags(self, input_flags: FlagsGroup):
         self._input_flags = input_flags
 
-    def get_input_flags(self) -> list[InputFlag]:
+    def get_input_flags(self) -> FlagsGroup:
         return self._input_flags
 
     @staticmethod
-    def parse(raw_command: str) -> Command:
+    def parse(raw_command: str) -> 'InputCommand[T]':
         list_of_tokens = raw_command.split()
         command = list_of_tokens[0]
         list_of_tokens.pop(0)
 
-        flags = []
+        flags: FlagsGroup = FlagsGroup()
         current_flag_name = None
         current_flag_value = None
         for _ in list_of_tokens:
             flag_prefix_last_symbol_index = _.rfind('-')
             if _.startswith('-'):
                 if current_flag_name or len(_) < 2 or len(_[:flag_prefix_last_symbol_index]) > 3:
-                    raise InvalidInputFlagsException
+                    raise IncorrectInputFlagException()
                 else:
                     current_flag_name = _
             else:
                 if not current_flag_name:
-                    raise InvalidInputFlagsException
+                    raise IncorrectInputFlagException()
                 else:
                     current_flag_value = _
             if current_flag_name and current_flag_value:
@@ -40,15 +45,15 @@ class InputCommand(Command):
                                        flag_prefix=flag_prefix)
                 input_flag.set_value(current_flag_value)
 
-                flags.append(input_flag)
+                flags.add_flag(input_flag)
 
                 current_flag_name = None
                 current_flag_value = None
-
-        if len(flags) == 0:
-            return Command(command=command)
+        if len(flags.get_flags()) == 0:
+            return InputCommand(command=command)
         else:
-            flags = FlagsGroup(flags=flags)
-            return Command(command=command, flags=flags)
+            input_command = InputCommand(command=command)
+            input_command.set_input_flags(flags)
+            return input_command
 
 
diff --git a/argenta/command/input_comand/exceptions.py b/argenta/command/input_comand/exceptions.py
index 7dd5ebd..4cf0ec0 100644
--- a/argenta/command/input_comand/exceptions.py
+++ b/argenta/command/input_comand/exceptions.py
@@ -1,3 +1,16 @@
-class InvalidInputFlagsException(Exception):
+from ..params.flag.input_flag.entity import InputFlag
+
+
+class InvalidInputFlagException(Exception):
+    def __init__(self, flag: InputFlag):
+        self.flag = flag
     def __str__(self):
-        return "Invalid Input Flags"
+        return ("Invalid Input Flags\n"
+                f"Unknown or invalid input flag: '{self.flag.get_string_entity()} {self.flag.get_value()}'")
+
+class IncorrectInputFlagException(Exception):
+    def __str__(self):
+        return "Incorrect Input Flags"
+
+
+
diff --git a/argenta/command/params/flag/entity.py b/argenta/command/params/flag/entity.py
index c772a4d..8953a0f 100644
--- a/argenta/command/params/flag/entity.py
+++ b/argenta/command/params/flag/entity.py
@@ -18,6 +18,7 @@ class Flag:
             string_entity: str = self.flag_prefix + self.flag_name.lower()
         else:
             string_entity: str = self.flag_prefix + self.flag_name
+        print(string_entity)
         return string_entity
 
     def get_value(self):
diff --git a/argenta/command/params/flags_group/__init__.py b/argenta/command/params/flag/flags_group/__init__.py
similarity index 100%
rename from argenta/command/params/flags_group/__init__.py
rename to argenta/command/params/flag/flags_group/__init__.py
diff --git a/argenta/command/params/flag/flags_group/entity.py b/argenta/command/params/flag/flags_group/entity.py
new file mode 100644
index 0000000..a27e4f4
--- /dev/null
+++ b/argenta/command/params/flag/flags_group/entity.py
@@ -0,0 +1,22 @@
+from argenta.command.params.flag.entity import Flag
+from argenta.command.params.flag.input_flag.entity import InputFlag
+
+
+class FlagsGroup:
+    def __init__(self, flags: list[Flag | InputFlag] = None):
+        self._flags: list[Flag | InputFlag] = [] if not flags else flags
+
+    def get_flags(self):
+        return self._flags
+
+    def add_flag(self, flag: Flag | InputFlag):
+        self._flags.append(flag)
+
+    def add_flags(self, flags: list[Flag | InputFlag]):
+        self._flags.extend(flags)
+
+    def __iter__(self):
+        return iter(self._flags)
+
+    def __next__(self):
+        return next(iter(self))
diff --git a/argenta/command/params/input_flag/__init__.py b/argenta/command/params/flag/input_flag/__init__.py
similarity index 100%
rename from argenta/command/params/input_flag/__init__.py
rename to argenta/command/params/flag/input_flag/__init__.py
diff --git a/argenta/command/params/input_flag/entity.py b/argenta/command/params/flag/input_flag/entity.py
similarity index 79%
rename from argenta/command/params/input_flag/entity.py
rename to argenta/command/params/flag/input_flag/entity.py
index 7ceb968..47f167b 100644
--- a/argenta/command/params/input_flag/entity.py
+++ b/argenta/command/params/flag/input_flag/entity.py
@@ -1,4 +1,4 @@
-from ...params.flag.entity import Flag
+from ...flag.entity import Flag
 
 
 class InputFlag(Flag):
diff --git a/argenta/command/params/flags_group/entity.py b/argenta/command/params/flags_group/entity.py
deleted file mode 100644
index 14e5150..0000000
--- a/argenta/command/params/flags_group/entity.py
+++ /dev/null
@@ -1,6 +0,0 @@
-from argenta.command.params.flag.entity import Flag
-
-
-class FlagsGroup:
-    def __init__(self, flags: list[Flag]):
-        self.flags = flags
diff --git a/argenta/router/entity.py b/argenta/router/entity.py
index 31e910d..b4de5e2 100644
--- a/argenta/router/entity.py
+++ b/argenta/router/entity.py
@@ -1,5 +1,7 @@
 from typing import Callable, Any
 from ..command.entity import Command
+from ..command.input_comand.entity import InputCommand
+from ..command.input_comand.exceptions import InvalidInputFlagException
 from ..router.exceptions import (UnknownCommandHandlerHasAlreadyBeenCreatedException,
                                  RepeatedCommandException)
 
@@ -43,15 +45,29 @@ class Router:
         return wrapper
 
 
-    def input_command_handler(self, input_command: Command):
+    def input_command_handler(self, input_command: InputCommand):
         input_command_name: str = input_command.get_string_entity()
         for command_entity in self._command_entities:
-            if input_command_name.lower() == command_entity['command'].get_string_entity():
+            if input_command_name.lower() == command_entity['command'].get_string_entity().lower():
                 if self.ignore_command_register:
-                    return command_entity['handler_func']()
-                else:
-                    if input_command == command_entity['command']:
+                    if input_command.get_input_flags():
+                        for flag in input_command.get_input_flags():
+                            is_valid = command_entity['command'].validate_input_flag(flag)
+                            if not is_valid:
+                                raise InvalidInputFlagException(flag)
+                        return command_entity['handler_func'](input_command.get_input_flags())
+                    else:
                         return command_entity['handler_func']()
+                else:
+                    if input_command_name == command_entity['command'].get_string_entity():
+                        if input_command.get_input_flags():
+                            for flag in input_command.get_input_flags():
+                                is_valid = command_entity['command'].validate_input_flag(flag)
+                                if not is_valid:
+                                    raise InvalidInputFlagException(flag)
+                            return command_entity['handler_func'](input_command.get_input_flags())
+                        else:
+                            return command_entity['handler_func']()
 
 
     def unknown_command_handler(self, unknown_command):
diff --git a/tests/mock_app/handlers/routers.py b/tests/mock_app/handlers/routers.py
index 6f0f4d0..bfb5d98 100644
--- a/tests/mock_app/handlers/routers.py
+++ b/tests/mock_app/handlers/routers.py
@@ -1,12 +1,10 @@
 from rich.console import Console
 
 from argenta.command.entity import Command
+from argenta.command.params.flag.flags_group.entity import FlagsGroup
 from argenta.router import Router
 
 from ..handlers.handlers_implementation.help_command import help_command
-from ..handlers.handlers_implementation.solving_command import start_solving_command
-from ..handlers.handlers_implementation.upgrade_command import upgrade_command
-
 
 work_router: Router = Router(title='Work points:')
 settings_router: Router = Router(title='Settings points:')
@@ -15,7 +13,9 @@ console = Console()
 
 
 @work_router.command(command=Command(command='0', description='Get Help'))
-def command_help():
+def command_help(args: FlagsGroup):
+    print(args.get_flags())
+    print('aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa')
     help_command()
 
 
diff --git a/tests/test.py b/tests/test.py
index 4fe3d3c..e9feaf5 100644
--- a/tests/test.py
+++ b/tests/test.py
@@ -1,6 +1,9 @@
-from typing import Literal, LiteralString
+class Entity:
+    pass
 
-x: LiteralString = '---'
-m: LiteralString = input()
-if m == '-':
-    x = m
+class Person(Entity):
+    pass
+
+a: Entity = Entity()
+print(a)
+a = Person()
\ No newline at end of file