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