import java.util.*;

public class Main {
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);

		String s=sc.next();
		if(s.matches("A[a-z]{1}[a-z]*C[a-z]*[a-z]{1}")){
			System.out.println("AC");
		}else{
			System.out.println("WA");
		}


	}
} import java.util.*; util.* java public class Main {
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);

		String s=sc.next();
		if(s.matches("A[a-z]{1}[a-z]*C[a-z]*[a-z]{1}")){
			System.out.println("AC");
		}else{
			System.out.println("WA");
		}


	}
} Main public static void main(String[] args){
		Scanner sc = new Scanner(System.in);

		String s=sc.next();
		if(s.matches("A[a-z]{1}[a-z]*C[a-z]*[a-z]{1}")){
			System.out.println("AC");
		}else{
			System.out.println("WA");
		}


	} main {
		Scanner sc = new Scanner(System.in);

		String s=sc.next();
		if(s.matches("A[a-z]{1}[a-z]*C[a-z]*[a-z]{1}")){
			System.out.println("AC");
		}else{
			System.out.println("WA");
		}


	} Scanner sc = new Scanner(System.in); sc new Scanner(System.in) String s=sc.next(); s sc.next() sc.next sc if(s.matches("A[a-z]{1}[a-z]*C[a-z]*[a-z]{1}")){
			System.out.println("AC");
		}else{
			System.out.println("WA");
		} s.matches("A[a-z]{1}[a-z]*C[a-z]*[a-z]{1}") s.matches s "A[a-z]{1}[a-z]*C[a-z]*[a-z]{1}" {
			System.out.println("AC");
		} System.out.println("AC") System.out.println System.out System System.out "AC" {
			System.out.println("WA");
		} System.out.println("WA") System.out.println System.out System System.out "WA" String[] args args public class Main {
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);

		String s=sc.next();
		if(s.matches("A[a-z]{1}[a-z]*C[a-z]*[a-z]{1}")){
			System.out.println("AC");
		}else{
			System.out.println("WA");
		}


	}
} public class Main {
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);

		String s=sc.next();
		if(s.matches("A[a-z]{1}[a-z]*C[a-z]*[a-z]{1}")){
			System.out.println("AC");
		}else{
			System.out.println("WA");
		}


	}
} Main
import java.util.*;

public class Main {
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);

		String s=sc.next();
		if(s.matches("A[a-z]{1}[a-z]*C[a-z]*[a-z]{1}")){
			System.out.println("AC");
		}else{
			System.out.println("WA");
		}


	}
}
