判断两个字符串是否相等。要求大小写字母不敏感,即同一个字母的大写和小写视作相同字符。
输入两行,每行是一个字符串,长度不超过100字符。
若两字符串相等,输出“yes”,否则输出“no”。
abCdeF aBcdEF
yes
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