import java.util.Scanner;

public class Main {
	public static void main(String[] arg) {
		Scanner sc = new Scanner(System.in);
		String s = sc.next();
		System.out.print(aCheck(s)&&cCheck(s)&&sCheck(s)?"AC":"WA");
	}
	private static boolean aCheck(String str){
		return str.matches("^A.*");
	}
	
	private static boolean cCheck(String str){
		return str.matches("^.{2}.*C.*.{1}$");
	}
	
	private static boolean sCheck(String str){
		return str.matches("^.[a-z]*C[a-z]*$");
	}
}

/tmp/hf-datasets-cache/medium/datasets/42704881117311-config-parquet-and-info-qiankunmu-Project_CodeNet-896c9d36/hub/datasets--qiankunmu--Project_CodeNet_Python800_and_Java250/snapshots/c899fde44a77ba1cc14973ed3de064e4ff3aadc7/Project_CodeNet_Java250.tar.gz