{"raw_statement":[{"iden":"problem statement","content":"The postal code in Atcoder Kingdom is $A+B+1$ characters long, its $(A+1)$\\-th character is a hyphen `-`, and the other characters are digits from `0` through `9`.\nYou are given a string $S$. Determine whether it follows the postal code format in Atcoder Kingdom."},{"iden":"constraints","content":"*   $1≤A,B≤5$\n*   $|S|=A+B+1$\n*   $S$ consists of `-` and digits from `0` through `9`."},{"iden":"input","content":"Input is given from Standard Input in the following format:\n\n$A$ $B$\n$S$"},{"iden":"sample input 1","content":"3 4\n269-6650"},{"iden":"sample output 1","content":"Yes\n\nThe $(A+1)$\\-th character of $S$ is `-`, and the other characters are digits from `0` through `9`, so it follows the format."},{"iden":"sample input 2","content":"1 1\n---"},{"iden":"sample output 2","content":"No\n\n$S$ contains unnecessary `-`s other than the $(A+1)$\\-th character, so it does not follow the format."},{"iden":"sample input 3","content":"1 2\n7444"},{"iden":"sample output 3","content":"No"}],"translated_statement":null,"sample_group":[],"show_order":["default"],"formal_statement":null,"simple_statement":null,"has_page_source":true}