C-Language legal identifiers

Problem Description

Enter a string to determine whether it is a valid identifier for C.

Input

The input data contains multiple test instances, and the first row of the data is an integer n, representing the number of test instances, followed by n rows of input data, each of which is a string of no more than 50 length.

Output

For each set of input data, output one line. If the input data is a valid identifier for C, output "yes", otherwise, output "no".

Sample Input

3

12ajf

Fi8x_a

FF Ai_2

Sample Output

No

Yes

No

1#include <stdio.h>2#include <ctype.h>3  4 intMain () {5     intN;6     CharC;7     inti;8     intFlag;9      Tenscanf"%d",&n); One GetChar (); A       -      while(n--){ -I=0; theflag=0; -          while((C=getchar ())! ='\ n'){ -             if(i==0){ -                 if(c=='_'|| Isalpha (c)! =0) +                     ; -                       +                 Else Aflag=1; at             } -               -             Else{ -                 if(c=='_'|| Isalpha (c)! =0|| IsDigit (c)! =0) -                     ; -                       in                 Else -flag=1; to             } +                   -i++; the         } *           $         if(flag==0)Panax Notoginsengprintf"yes\n"); -               the         Else +printf"no\n"); A     } the               +     return 0; -}

C-Language legal identifiers