#include<stdio.h>
int main()
    int a,b,c;
    scanf("%d %d %d", &a, &b, &c);
    if(a <=0 || b <=0|| c <=0){
        printf("Invaild Input");
    }
    else if(a == b && b == c){
        printf("Equilateral");
    }
    else if(a == b || b == c|| a == c){
        printf("Isosceles");
    }
    else {
        printf("Scalane");
    }
    return 0;
}