#include <stdio.h>
void main ()
{
    int n;
    int k;
    scanf("%d %d",&n,&k);
    if (n<0 && n>=10 || k<-100 && k>100){
        printf("Invalid input\n");
    }
    else if(n=0){
        printf("Tree is Empty\n");
    }
    else{
        printf("%2*d\n",n,k);
    }
}