Problem A (proquest 2013)

public class ProblemA{
    public static void main(String []args){
        java.util.Scanner in=new java.util.Scanner(System.in);
        StringBuffer sb=new StringBuffer();

        int m=in.nextInt();
        int x,y;
        for(int i=0;i<m;i++){
            x=in.nextInt();
            y=in.nextInt();

            if(allEvenNumber(x+y)&&allEvenNumber(x*y)){
                sb.append("Case #"+(i+1)+": Win\n");
            }
            else{
                sb.append("Case #"+(i+1)+": Lose\n");
            }
        }
        System.out.print(sb.toString());
        System.exit(0);
    }
    public static boolean allEvenNumber(int n){
        if(n!=0){
            int x=n%10;
            if(x%2==0){
                n=(n-x)/10;
                return allEvenNumber(n);
            }
            else{
                return false;
            }
        }
        else{
            return true;
        }
    }
}