#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");
 }     
 else if(a == b && b == c)
 {
     printf("Eqilateral");
 }     
 else if(a == b || b == c || a == c)
}
     printf("Isosceles");
}     
 else
 {
     printf("Scalene");
 }     
 return 0;
}