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++14 (GCC 5.4.1) (judge verdict: Accepted)

#include<iostream>
#include<string>
using namespace std;

int main(void){
 


    string S;
    cin>>S;
    int N,T,t;
    N=S.size();
    T=0;
    t=0;

    if(S[0]!='A'){
        cout<<"WA"<<endl;
                return 0;  
    }

    for(int i=2;i<=(N-2);i++){
        if(S[i]=='C'){
            T=T+1;
        }
    }
    if(T!=1){
        cout<<"WA"<<endl;
        return 0;  
    }
    
    for(int i=1;i<N;i++){    
        if('a' <=S[i] && S[i] <= 'z'){
            t=t+1;
        }
    }

    if(t==N-2){
        cout<<"AC"<<endl;
    }else{
        cout<<"WA"<<endl;
    }

    return 0;
}