#include<bits/stdc++.h>
#define ll long long
#define endl '\n'

using namespace std;

int32_t main() {
    ios_base :: sync_with_stdio(0);
    cin.tie(0); cout.tie(0);

    int a, b, c;
    cin >> a >> b >> c;

    if (a == b && b == c) cout << "Equilateral" << endl;
    else if (a == b || b == c || a == c) cout << "Isosceles" << endl;
    else cout << "Scalene" << endl;


    return 0;
}