Problem:
Score : 200 points

Problem Statement

You are given a string S. Each character of S is uppercase or lowercase English letter.
Determine if S satisfies all of the following conditions:

The initial character of S is an uppercase A.

There is exactly one occurrence of C between the third character from the beginning and the second to last character (inclusive).

All letters except the A and C mentioned above are lowercase.

Constraints

4 ≤ |S| ≤ 10 (|S| is the length of the string S.)

Each character of S is uppercase or lowercase English letter.

Input

Input is given from Standard Input in the following format:

S

Output

If S satisfies all of the conditions in the problem statement, print AC; otherwise, print WA.

Sample Input 1

AtCoder

Sample Output 1

AC

The first letter is A, the third letter is C and the remaining letters are all lowercase, so all the conditions are satisfied.

Sample Input 2

ACoder

Sample Output 2

WA

The second letter should not be C.

Sample Input 3

AcycliC

Sample Output 3

WA

The last letter should not be C, either.

Sample Input 4

AtCoCo

Sample Output 4

WA

There should not be two or more occurrences of C.

Sample Input 5

Atcoder

Sample Output 5

WA

The number of C should not be zero, either.

Solution in C (GCC 5.4.1) (judge verdict: Accepted)

#include <stdio.h>

#include <string.h>

int main()

{

    char ara[100] ;

    gets(ara) ; int flag = 0 ;

    int len = strlen( ara ) , count = 0 ;

    for( int a = 0 ; ara[a] != '\0' ; a++ )  {

        if( ara[0] == 'A' )  {

            for( int b = 2 ; b <= ( len - 2 ) ; b++ )  {

                if( ara[b] == 'C' )  {

                    count++ ;

                }
 //printf("%d\n",count) ;
            }

            if( count == 1 )  {

                for( int c = 0 ; ara[c] != '\0' ; c++ )  {

                    if(   ara[c] >= 'D' && ara[c] <= 'Z'  )  {

                       printf("WA\n") ;

                       return 0 ;

                    }

                    if( ara[c] == 'B' )  {

                        printf("WA\n") ;

                        return 0 ;

                    }



                }
                
                 printf("AC\n") ;
                 
                   return 0 ;
            }

            else  {

                printf("WA\n") ;

                        return 0 ;

            }

        }

        else  {

            printf("WA\n") ;

            return 0 ;

        }

    }



    

}