Memory Exceeded
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代码
s = input()
lst = list(s)
for i in range(len(lst)):
    if ord(lst[i]) - ord('a') < 23:
        lst[i] = chr(ord(lst[i])+4)
    else:
        lst[i] = chr(ord(lst[i])-22)
for j in lst:
    print(j,end = '')