password validator final exam

password = input()

command_data = input()
while not command_data == "Complete":
    curr_data = command_data.split()
    command = curr_data[0]
    if command == "Make":

        if curr_data[1] == "Upper":
            index = int(curr_data[2])
            new_password = ""
            for current_index, char in enumerate(password):
                if current_index == index:
                    new_password += char.upper()
                else:
                    new_password += char
            password = new_password
            print(password)

        elif curr_data[1] == "Lower":
            index = int(curr_data[2])
            new_password = ""
            for current_index, char in enumerate(password):
                if current_index == index:
                    new_password += char.lower()
                else:
                    new_password += char
            password = new_password
            print(password)

    elif command == "Insert":
        index = int(curr_data[1])
        char = curr_data[2]
        if index in range(len(password)):
            password = password[:index] + char + password[index:]
            print(password)

    elif command == "Replace":
        char = curr_data[1]
        value = int(curr_data[2])
        if char in password:
            password = password.replace(char, chr(ord(char) + value))
            print(password)

    elif command == "Validation":
        if len(password) < 8:
            print("Password must be at least 8 characters long!")
        for ch in password:
            if not ch.isalnum() and not ch == "_":
                print("Password must consist only of letters, digits and _!")
                break
        upper_counter = 0
        lower_counter = 0
        digit_counter = 0
        for ch in password:
            if ch.isupper():
                upper_counter += 1
            elif ch.islower():
                lower_counter += 1
            elif ch.isdigit():
                digit_counter += 1
        if upper_counter == 0:
            print("Password must consist at least one uppercase letter!")
        if lower_counter == 0:
            print("Password must consist at least one lowercase letter!")
        if digit_counter == 0:
            print("Password must consist at least one digit!")

    command_data = input()