{"raw_statement":[{"iden":"problem statement","content":"You are given a string $S$ ending with `er` or `ist`.  \nIf $S$ ends with `er`, print `er`; if it ends with `ist`, print `ist`."},{"iden":"constraints","content":"*   $2 \\le |S| \\le 20$\n*   $S$ consists of lowercase English letters.\n*   $S$ ends with `er` or `ist`."},{"iden":"input","content":"Input is given from Standard Input in the following format:\n\n$S$"},{"iden":"sample input 1","content":"atcoder"},{"iden":"sample output 1","content":"er\n\n$S=$\"`atcoder`\" ends with `er`."},{"iden":"sample input 2","content":"tourist"},{"iden":"sample output 2","content":"ist"},{"iden":"sample input 3","content":"er"},{"iden":"sample output 3","content":"er"}],"translated_statement":null,"sample_group":[],"show_order":["default"],"formal_statement":null,"simple_statement":null,"has_page_source":true}