poj 3349

import java.util.Scanner;
import java.util.Arrays;
import java.io.BufferedReader;
import java.io.InputStreamReader;


class Node{
        int lengths[] = new int[6];
        
        Node(int lengths[]){
            this.lengths = lengths;
            Arrays.sort(lengths);
        }
        public int get(int i){
            return lengths[i];
        }
    }

public class Main{
    static int n;
    
    static boolean same(Node x,Node y){
        for(int i=0;i<6;i++){
            if(x.get(i)!=y.get(i))
                return false;
        }
        return true;
    }
    
    public static void main(String[] args) throws Exception{
        BufferedReader bf = new BufferedReader(new InputStreamReader(System.in));
        n = Integer.parseInt(bf.readLine());
        int flag = 0;
        Node nodes[][] = new Node[1500][100];
        int m[] = new int[1500];
        Arrays.fill(m,0);
        while(n!=0){
            n--;
            int sum=0;
            int temp[] = new int[6];
            String[] line = bf.readLine().split(" ");
            for(int i=0;i<6;i++){
                temp[i] = Integer.parseInt(line[i]);
                sum = (sum+temp[i])%1497;
            }
            if(flag == 0){
                Node node = new Node(temp);
                for(int j=0;j<m[sum];j++){
                    if(same(node,nodes[sum][j])){
                        flag = 1;
                        break;
                    }
                }
                nodes[sum][m[sum]] = node;
                m[sum]++;
            }
        }
        if(flag == 1)
            System.out.println("Twin snowflakes found.");
        else
            System.out.println("No two snowflakes are alike.");
        bf.close();
    }
}