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 Java8 (OpenJDK 1.8.0) (judge verdict: Wrong Answer)

import java.util.*;

class Main{
    public static void main(String[] args){
        Scanner sc = new Scanner (System.in);
        String  S = sc.next();
        String s = S.substring(2,S.length()-1);
        int cnt = 0;
        int tmp = 0;

        boolean jud = false;

        if(S.charAt(0) == 'A'){
            for(int i = 0;i < s.length();i++){
                if(s.charAt(i) == 'C'){
                    cnt++;
                    tmp = i;
                }
            }
            if(cnt == 1)
            for(int i = 0;i < S.length();i++){
                if(i == 0 || i == tmp){
                    continue;
                }else if(Character.isUpperCase(S.charAt(i))){
                       
                }else if(Character.isLowerCase(S.charAt(i))){
                    jud = true;
                }
        }
        

        if(jud == true){
            System.out.println("AC");
        }else{
            System.out.println("WA");
        }

        
        }
    }
}