{"raw_statement":[{"iden":"problem statement","content":"You are given a string $S$ consisting of lowercase English letters. Determine whether all the characters in $S$ are different."},{"iden":"constraints","content":"*   $2 ≤ |S| ≤ 26$, where $|S|$ denotes the length of $S$.\n*   $S$ consists of lowercase English letters."},{"iden":"input","content":"Input is given from Standard Input in the following format:\n\n$S$"},{"iden":"sample input 1","content":"uncopyrightable"},{"iden":"sample output 1","content":"yes"},{"iden":"sample input 2","content":"different"},{"iden":"sample output 2","content":"no"},{"iden":"sample input 3","content":"no"},{"iden":"sample output 3","content":"yes"}],"translated_statement":null,"sample_group":[],"show_order":["default"],"formal_statement":null,"simple_statement":null,"has_page_source":true}