// I AM A MUSLIM

#include "bits/stdc++.h"

#pragma GCC optimize("O3,unroll-loops")
#pragma GCC target("avx2,bmi,bmi2,lzcnt,popcnt")

#define fast_io std::ios::sync_with_stdio(0);std::cin.tie(0)
#define lli long long int
#define flush fflush(stdout)
#define line printf("\n")
#define yn(a, b) printf("%s\n", (a) >= (b) ? "Yes":"No")
#define amodm(a, M) (((a)%M+M)%M)
// #define int lli

using pii = std::pair<int,int>;

const int MOD = 1000000007;
const int mxN = 500100;

signed main() {
    int testCases=1;
    // scanf("%d",&testCases);
    
    for (int TC = 1; TC <= testCases; TC++) {
        int a[3];
        for (int i = 0; i < 3; i++) scanf("%d",&a[i]);
        std::sort(a,a+3);
        if (a[0]+a[1] > a[2]) {
            if (a[0] == a[2]) {
                puts("Equilateral");
            } else if ((a[0] == a[1]) || (a[1] == a[2])) {
                puts("Isosceles");
            } else {
                puts("Scalene");
            }
        } else {
            puts("Not a triangle");
        }
        
    }
    
    return 0;
}