#include <stdio.h>
#include <stdlib.h>

int main()
{
    int br1, br2;
    int temp=0, suma_br2=0, suma_br1=0;
    scanf("%d %d", &br1, &br2);

    if(br1>0 && br2>0){
        if(br1>br2){
            temp=br1; //sekogas pomaliot mi e u br1
            br1=br2;
            br2=temp;
        }
        while(br2){
            suma_br2 += br2%10;
            br2 /= 100;
        }
        while(br1){
            suma_br1 += br1%10;
            br1 /= 10;
        }
        if(suma_br1==suma_br2) printf("Ista suma");
        else printf("ne");
    }

    else printf("Invalid input");
    return 0;
}