{"raw_statement":[{"iden":"statement","content":"输入两个字符串，验证其中一个串是否为另一个串的子串。"},{"iden":"input","content":"两行，每行一个字符串。"},{"iden":"output","content":"若第一个串 $s_1$ 是第二个串 $s_2$ 的子串，则输出`(s1) is substring of (s2)`；\n\n否则，若第二个串 $s_2$ 是第一个串 $s_1$ 的子串，输出`(s2) is substring of (s1)`；\n\n否则，输出 `No substring`。"},{"iden":"note","content":"对于 $100 \\%$ 的数据，字符串长度在 $30$ 以内。"}],"translated_statement":null,"sample_group":[["abc\ndddncabca","abc is substring of dddncabca"],["aaa\nbbb","No substring"]],"show_order":[],"formal_statement":null,"simple_statement":null,"has_page_source":false}