{"raw_statement":[{"iden":"problem statement","content":"We call a string **hard-to-read** when its odd-positioned ($1$\\-st, $3$\\-rd, $5$\\-th, ... from the beginning) characters are all lowercase English letters and its even-positioned characters ($2$\\-nd, $4$\\-th, $6$\\-th, ... from the beginning) are all uppercase English letters.\nDetermine whether a string $S$ is hard-to-read."},{"iden":"constraints","content":"*   $S$ consists of uppercase and lowercase English letters.\n*   The length of $S$ is between $1$ and $1000$ (inclusive)."},{"iden":"input","content":"Input is given from Standard Input in the following format:\n\n$S$"},{"iden":"sample input 1","content":"dIfFiCuLt"},{"iden":"sample output 1","content":"Yes\n\nThe odd-positioned characters are all lowercase and the even-positioned characters are all uppercase, so it is hard-to-read."},{"iden":"sample input 2","content":"eASY"},{"iden":"sample output 2","content":"No\n\nThe $3$\\-rd character is not lowercase, so it is not hard-to-read."},{"iden":"sample input 3","content":"a"},{"iden":"sample output 3","content":"Yes"}],"translated_statement":null,"sample_group":[],"show_order":["default"],"formal_statement":null,"simple_statement":null,"has_page_source":true}