# include <stdio.h>
int main()
{
    int n1,n2,n3;
    scanf("%d",&n1);
    scanf("%d",&n2);
    scanf("%d",&n3);
{
if (n1=n2=n3)
{
    printf("Equilateral");
}
else if (n1=n2 or n2=n3 or n1=n3)
{
    printf("Isosceles");
}
else if n1=!n2=!n3
{
    printf("Scalene");
}
else 
{
    printf("invalid input");
}}
return 0;
}
}