Python Hangman Problems

I’ve been trying to create Hangman in Python for a school assessment but I don’t understand what is going wrong. My problem here is that after the user guesses the final letter, it keeps on repeating.

import random import time  name = input("What is your name? ") print(name + ", ay?") time.sleep(1) start = input("Up for a game of Hangman?(y/n) ")  lis = random.choice(["yet"]) dash = [] while len(dash) != len(lis):    dash.append("_")  guess = [] guesscomb = "".join(guess) wrongcount=int(0) alphabet = "abcdefghijklmnopqrstuvwxyz"  if start == "y":     print("One game of Hangman comin' right up,",name)     letter = input("Alright then, Guess a letter: ")     thing = ''.join(dash)      while guesscomb != thing:         if letter == "" or letter == " " or len(letter) != 1:             print("I don't understand. Please only use singular letters.")             letter = input("Guess a letter: ")              elif letter in lis and letter in alphabet:             print("Nice!")              location = lis.find(letter)             dash[location] = letter             guess.append(letter)             alphabet.replace(letter," ")             guesscomb = "".join(guess)              letter = input("Guess a letter: ")          else:             print("Wrong.")             wrongcount = wrongcount + 1              print("Total Mistakes:",wrongcount)             letter = input("Guess a letter: ")        elif start == "n":     input("Shame.")     quit()  print("Good Job!") time.sleep(10) ```