#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\n");
}
else if ((a + b <=c) || (a + c <= b) || (b + c <= a)){
    printf("Invalid input\n");
}
else if(a == b && b == c){
    printf("Equilateral\n");
}
else if (a == b || b == c || a == c ){
    printf("Isoceles\n");
}
else {
    printf("Scalene\n")
}
return 0;
}