问题描述 |
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输入描述 |
Multiple lines, each line contains a sentence. |
输出描述 |
For each sentence output YES if it is reasonable otherwise NO. |
样例输入复制样例 |
1+1=2 1+1=3 Today is April Fools' Day. Today is Labor Day. |
样例输出 |
YES NO YES NO |
提示说明 |
Happy April Fools' Day! |
相关 |