import java.util.Scanner;

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]+C[a-z]+")) {
            System.out.println("AC");
        } else {
            System.out.println("WA");
        }
        sc.close();
    }
} import java.util.Scanner; Scanner 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]+C[a-z]+")) {
            System.out.println("AC");
        } else {
            System.out.println("WA");
        }
        sc.close();
    }
} Main public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        String S = sc.next();
        if (S.matches("A[a-z]+C[a-z]+")) {
            System.out.println("AC");
        } else {
            System.out.println("WA");
        }
        sc.close();
    } main {
        Scanner sc = new Scanner(System.in);
        String S = sc.next();
        if (S.matches("A[a-z]+C[a-z]+")) {
            System.out.println("AC");
        } else {
            System.out.println("WA");
        }
        sc.close();
    } 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]+C[a-z]+")) {
            System.out.println("AC");
        } else {
            System.out.println("WA");
        } S.matches("A[a-z]+C[a-z]+") S.matches S "A[a-z]+C[a-z]+" {
            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" sc.close() sc.close sc 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]+C[a-z]+")) {
            System.out.println("AC");
        } else {
            System.out.println("WA");
        }
        sc.close();
    }
} 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]+C[a-z]+")) {
            System.out.println("AC");
        } else {
            System.out.println("WA");
        }
        sc.close();
    }
} Main
import java.util.Scanner;

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]+C[a-z]+")) {
            System.out.println("AC");
        } else {
            System.out.println("WA");
        }
        sc.close();
    }
}