#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("Equilateral");
}
else if(a ==b || b == c || a==c)
{
    printf("Isoceles");
}
else
{
    printf("scalene");
}
return 0;
}