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13 lines
262 B
Python
13 lines
262 B
Python
s = input()
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if 0 < len(s) <= 1000:
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result = ""
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for c in s:
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if c.isupper():
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result += c.lower()
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elif c.islower():
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result += c.upper()
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else:
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result += c
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print(result)
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else:
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print("Error")
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