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import re
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def big_letter(file_path):
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pattern = r'^[1-9A-F]0*$'
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with open(file_path, 'r', encoding='utf-8') as file:
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for line in file:
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if re.match(pattern, line.strip()):
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print('yes')
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else:
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print('no')
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file_path = 'TaskE10/test.in'
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big_letter(file_path) |