import string
alphabet = list(string.ascii_lowercase)
upper_alphabet = list(string.ascii_uppercase)

message = input("What is your message? ")
shift_number = int(input("How many letters would you like to shift your message by? "))
encoded_message = ""
for letter in message:
    if letter in alphabet:
        new_position = alphabet.index(letter) + shift_number
        new_position = new_position % len(alphabet)
        encoded_message = encoded_message + alphabet[new_position]
    elif letter in upper_alphabet:
        new_position = upper_alphabet.index(letter) + shift_number
        new_position = new_position % len(upper_alphabet)
        encoded_message = encoded_message + upper_alphabet[new_position]
    else:
        encoded_message = encoded_message + letter

print("This is your encoded message:", encoded_message)