: Using U distinguishes uppercase numbers from lowercase numbers. Without it, A (1) would be indistinguishable from a (1). This is a common trap.
def main(): # Demonstration required by CodeHS original = "Hello World" print("Original:", original) encoded = encode(original) print("Encoded: ", encoded) decoded = decode(encoded) print("Decoded: ", decoded) 8.3 8 create your own encoding codehs answers