#include<stdio.h>
int main(){
    int a,b,c;
    scanf("%d %d %d", &a, &b, &c);
    if(a <=0 || b <=0 || c <=0){
        printf("Invalid Input\n");
    }
    else if((a + b > c) && (a+ c > b) && (b + c > a)){
        if(a== b && b == c){
            printf("Equilaterar\n");
    }else if(a == b || b == c || a == c){
            printf("Isosceles\n");
    }else{
         printf("Scalene\n");
    }
    }else{
        printf("Invalid Input\n");
    }
    retrun 0;
}