convert alphabet to cuneiform or vice versa using python

cuneiform.py

alphabet = 'abcdefghijklmnopqrstufwxyz'
cuneiform = '𒋻𒁀𐏓𒁓𒀼𐎣𒋝𒀂𒐕𒑟𒐞𒁇𐎠𒐖𒆸𒇬𒌒𒇲𒔼𒈦𒑚𐎏𒉼𒉽𒌨𒑣'

print("a: from alphabet to cuneiform.")
print("c: from cuneiform to normal text")
choice = input("Enter your choice (a/c): ").replace(' ', '')

if choice == 'a' or choice == '':
    text = input("Enter text to convert to cuneiform: ")
    converted_text = ""
    for char in text:
        if char in alphabet:
            index = alphabet.index(char)
            converted_text += cuneiform[index]
        else:
            converted_text += char
    print("Converted text:", converted_text)

elif choice == 'c':
    text = input("Enter text to convert from cuneiform: ")
    converted_text = ""
    for char in text:
        if char in cuneiform:
            index = cuneiform.index(char)
            converted_text += alphabet[index]
        else:
            converted_text += char
    print("Converted text:", converted_text)

else:
    print("Invalid choice. Please enter 'a' or 'c'.")