₦airaland Forum

```
def is_isogram(word):
if type(word) != str:
raise TypeError('Argument should be a string')

elif word == "":
return (word, False)
else:
word = word.lower()
for char in word:
if word.count(char) > 1:
return (word, False)
else:
return (word, True)
```

Anyone with a clue why this is refusing to submit.