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: Accepted)

import java.util.Scanner;

class Main{

	static char[][] map;
	static int H;
	static int W;

	public static void main(String[] args) {



		Scanner sc = new Scanner(System.in);			//文字の入力
		String string = sc.next();
		if(string.charAt(0) != 'A'){
			System.out.println("WA");
			return;

		}
		int c = 0;
		for(int i= 2;i < string.length()-1;i++){
			if(string.charAt(i) == 'C'){
				c++;
			}
		}
		for(int i = 1;i < string.length()-1;i++){
			if(Character.isUpperCase( string.charAt(i)) && string.charAt(i) != 'C'){
				System.out.println("WA");
				return;

			}
		}


		if(c != 1){
			System.out.println("WA");
			return;

		}

		if(Character.isUpperCase( string.charAt(string.length()-1) )){

			System.out.println("WA");
			return;

		}
		System.out.println("AC");


	}
}