yo mate! I am too lazy to explain but here is the code:
```
def get_index(word):
while True:
try:
index = int(input("Enter an index: "))
if index == -1:
return index
elif index >= len(word):
print ("invalid index")
elif index <= -1:
print ("invalid index")
else:
return index
except ValueError:
print ("invalid index")
def get_letter():
while True:
letter = str(input("Enter a letter: "))
if letter.islower() and len(letter)==1:
return letter
elif not letter.islower():
print ("Character must be a lowercase letter!")
elif len(letter) > 1:
print ("Must be exactly one character!")
def word_ladder(word):
while True:
index = get_index(word)
if index == -1:
return
else:
letter=get_letter()
word = list(word)
word[index] = letter
word = ("").join(word)
print (word)
word = input("Enter a word: ")
word_ladder(word)
```
Word Ladder should keep running and keep printing the results until the index is -1. Here is a quick solution.
-----------------------------------
# play word ladder
```
def get_index(word):
while True:
try:
pos = int(input("Enter an index: "))
if pos == -1:
return pos
elif pos >= len(word):
print "invalid index"
elif pos <= -1:
print "invalid index"
else:
return pos
except ValueError:
print "invalid index"
def get_letter():
while True:
char = str(input("Enter a letter: "))
if char.islower() and len(char)==1:
return char
elif not char.islower():
print "Character must be a lowercase letter!"
elif len(char) > 1:
print "Must be exactly one character!"
def word_ladder(word):
while True:
pos = get_index(word)
if pos == -1:
return
else:
char=get_letter()
word = list(word)
word[pos] = char
word = ("").join(word)
print word
word = input("Enter a word: ")
word_ladder(word)
```
