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>

int main(){

int p;
char S[10];
for(p = 0;S[p] != '\0';p++){
scanf("%s",&S[p]);
}

int i = 0,n = 0; //n:小文字が出てくる回数
while(S[i] != '\0'){
if(S[i] >= 'a'&&S[i] <= 'z'){
n++;
}
i++;
}

int c,j; //c:'C'が出てくる回数
for(j = 2; j <= i - 2; j++){
if(S[j] == 'C') c++;
}

if(S[0] == 'A'&&c == 1&&n == i - 2){
printf("AC");
}else{
printf("WA");
}

return 0;
}