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.io.OutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.PrintWriter;
import java.util.Scanner;
import java.lang.Character;

public class Main{
	public static void main(String[] args){
        InputStream inputStream = System.in;
        OutputStream outputStream = System.out;
        Scanner sc = new Scanner(inputStream);
        PrintWriter out = new PrintWriter(outputStream);
      	String S = sc.next();
      	boolean judge1 = false;
      	boolean judge2 = false;
      	boolean judge3 = false;
      	if(S.charAt(0) == 'A'){
        	judge1 = true;
        }
      	String middle_line = S.substring(2, S.length() - 1);
      	int count = 0;
      	for(int i = 0; i < middle_line.length(); i++){
          	if(Character.isUpperCase(middle_line.charAt(i))){
            	if(middle_line.charAt(i) == 'C'){
                	judge2 = true;
                }
              	count++;
            }
        }
      	if(count == 1){
        	judge3 = true;
        }
      	if(judge1 && judge2 && judge3){
        	out.println("AC");
        }else{
        	out.println("WA");
        }
        out.close();
    }
}