todo_list = []

def add_task(task):

    todo_list.append(task)

    print(f"Task added: {task}")

def view_tasks():

    print("To-Do List:")

    for i, task in enumerate(todo_list):

        print(f"{i + 1}. {task}")

def remove_task(index):

    try:

        task = todo_list.pop(index - 1)

        print(f"Task removed: {task}")

    except IndexError:

        print("Invalid index. Please enter a valid task number.")

while True:

    choice = input("Enter a command (add, view, remove, exit): ")

    if choice == "add":

        task = input("Enter a task to add: ")

        add_task(task)

    elif choice == "view":

        view_tasks()

    elif choice == "remove":

        index = int(input("Enter the number of the task to remove: "))

        remove_task(index)

    elif choice == "exit":

        break

    else:

        print("Invalid command. Please enter a valid command.")