2023-12-28 12:43:08 +01:00
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import sys
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import re
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2024-01-04 12:45:47 +01:00
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def emo_case(s):
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p = re.compile(r'^([A-Z\u0104-\u017B]?([a-z\u0105-\u017C][A-Z\u0104-\u017B])+[a-z\u0105-\u017C]?)')
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return "yes" if p.match(s) else "no"
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for _, l in enumerate(sys.stdin, start=1):
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print(emo_case(l))
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