#include<stdio.h>
int main(){
    int a,b,c;
    scanf("%d %d %d",&a,&b,&c);
    if((a<=0||b<=0||c<=0)||(a=>100||b=>100||c=>100)){
        printf("Invalid Input");
    }
    else if (c==a||b==a||b==c){
        printf("Isosceles");
    }
    else if((a!=b)&&(b!=c)&&(c!=a)){
        printf("Scalene");
    }
    else if(a==b&&b==c){
        printf("Equilateral");
        
    }
    return 0;
}