class Solution:
def findTheDifference(self, s: str, t: str) -> str:
alphabet_s = [0] * 30
alphabet_t = [0] * 30
s += " "
for i in range(len(t)):
if s[i] != " ":
alphabet_s[ord(s[i]) - 96] += 1
alphabet_t[ord(t[i]) - 96] += 1
else:
alphabet_t[ord(t[i]) - 96] += 1
for i in range(30):
if alphabet_s[i] < alphabet_t[i]:
return chr(i+96)
Python
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