{"raw_statement":[{"iden":"statement","content":"给定一个只包含小写字母的字符串，请你找到第一个仅出现一次的字符。如果没有，输出 `no`。"},{"iden":"input","content":"一个字符串，长度小于 $1100$。"},{"iden":"output","content":"输出第一个仅出现一次的字符，若没有则输出 `no`。"}],"translated_statement":null,"sample_group":[["abcabd","c"],["aabbcc","no"]],"show_order":[],"formal_statement":null,"simple_statement":null,"has_page_source":false}