#include<stdio.h>
int main(){
    int n1,n2,n3;
    scanf("%d",&n1);
    scanf("%d",&n2);
    scanf("%d",&n3);
    if(n1<=0 or n1>=100 || n2=0 or n2100 || n3=0 or n3=100){
        printf("Invalid input");
    }
    else if(n1==n2 && n2==n3 && n3==n1){
        printf("Equilateral");
    }
    else if(n1==n2!=n3 || n2==n3!=n1 || n3==n1!=n2){
        printf("Isosceles");
    }
    else{
        printf("Scalene");
    }
}