#include<stdio.h>
int main() {
    int a, b, c;
    scanf("%d %d %d",&a,&b,&c);
 if(a < 0 || b < 0 || c < 0)
 {
printf("\nInvalid Input");
 }     
 else if(a == b && b == c)
 {
printf("\nEqilateral");
 }     
 else if(a ==b||b==c||a==c)
}
printf("\nIsosceles");
}     
 else
 {
printf("\nScalene");
 }     
 return 0;
}