#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("Scalene");
}
return 0;