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def nearby_chars(c):
keyboard = [
"qwertyuiop",
"asdfghjkl",
"zxcvbnm",
]
for row in keyboard:
for i in range(len(row)):
if row[i] == c:
result = set()
if i + 1 < len(row):
result.add(row[i + 1])
if i - 1 >= 0:
result.add(row[i - 1])
return result
def is_word(word):
words = {
"hello",
}
return word in words
def nearby_words(x):
result = set()
for i in range(len(x)):
for c in nearby_chars(x[i]):
candidate = x[0:i] + c + x[i+1:]
if is_word(candidate):
result.add(candidate)
return result
print(nearby_words('gello'))
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