We all know that the variable names in C language are restricted, they have to obey the following rules: 1. With the leading of one of Latin letters(aka. 'a' to 'z', 'A' to 'Z') or underscore(aka. '_') 2. Only contain Latin letters, Arabic numeric digits(aka. '0' to '9') or underscore. I will give you several string literals, you should tell me if they can be used for the naming of variables. If it can be treated as a variable name, you need to print the string literal "Yes", otherwise output "No" (no need to print the pair of quotation marks). Do not consider C keywords.
输入格式
N and next N lines of string literals (without whitespace characters).