#include <stdio.h>

void classifyTriangle(int a, int b, int c) {
    if (a <= 0 ||b ==0|| c <= 0) {
        printf("Invlid Input\n")
        return;
        
    }
    if ( == b &&  b == c) {
        printf("Equilateral\n")
        return;
    }
    if (a == b || b == c || a == c) {
        printf("Isosceles\n");
        return;
    }
    printf("Scalene\n");
}

int main() {
    int a, b, c;
    scanf("%d %d %d" , &a, &b, &c);
    classifyTriangle(a, b, c);
    return 0;
}