29 lines
568 B
Python
29 lines
568 B
Python
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import string,sys
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s = list(input())
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option_one = True
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for i in string.ascii_lowercase:
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if i in s:
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option_one = False
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option_two = True
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if len(s) > 1:
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for i in range(1, len(s)):
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for j in string.ascii_lowercase:
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if s[i] == j:
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option_two = False
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comp = len(s) == 1 or option_two
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if not (comp or option_one):
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print(''.join(c for c in s))
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sys.exit()
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for idx, i in enumerate(s):
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if i in string.ascii_uppercase:
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s[idx] = i.lower()
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else:
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s[idx] = i.upper()
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print(''.join(c for c in s))
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