word1 = input()
word2 = input()
if word1 == 'да' and word2 == 'да':
print('ВЕРНО')
elif word1 == 'да' and word2 == 'нет':
print('ВЕРНО')
elif word1 == 'нет' and word2 == 'да':
print('ВЕРНО')
elif word1 == 'нет' and word2 == 'нет':
print('ВЕРНО')
elif word1 != 'да' or word1 != 'нет' and word2 != 'да' or word2 != 'нет':
print('НЕВЕРНО')
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