#include <stdio.h>
int main()
{
    int n1,n2,n3;
    scanf("%d %d %d",&n1,&n2,&n3);
    if(n1<=0 || n2<=0|| n3<=0){
        printf("Invalid input");
    }
    else if(n1==n2 && n2==n3){
        printf("Equilateral");
    }
    else
    else if(n1==n2 || n2==n3 || n1==n3){
        printf("Isoseles");
    }
    else{
        printf("Scalene");
    }
    return 0;
}