2019-10-28 18:26:22 +01:00
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#!/usr/bin/python3
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2019-10-28 19:53:27 +01:00
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import sys
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2019-10-28 18:26:22 +01:00
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import re
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def is_number(test):
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pattern = re.compile(r'^N(IE{6}|O{6})!{3}$')
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result = re.match(pattern, test)
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if result:
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return "yes"
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else:
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return "no"
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2019-10-28 19:36:44 +01:00
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for line in sys.stdin:
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print(is_number(line))
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