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: Wrong Answer)

#include <string.h>
#include <stdio.h>

int main()
{char s[11];
int i,cnt=0;
    scanf("%s",s);
    if(s[0]=='A'){
        for(i=2;i<= sizeof(s) - 2;i++){
            if(s[i]=='C'){
                cnt++;
            }
        }
        if(cnt==1){
            cnt=0;
            for(i=1;i<=sizeof(s);i++){
            if(s[i]>='A'&&s[i]<='Z'){
                cnt++;
            }    
            }
            if(cnt==1){
                printf("AC");
            }else{
                printf("WA");
            }
        }else{printf("WA");}
        }else {
        printf("WA");
    }

    return 0;
}