> #include <iostream>
> #include <cstdio>
> #include <cstring>
> #include <vector>
> using namespace std;
> const int MAXN = 100005;
> const int Mod = 1000005;
> struct Node
> {
>     int arm[6];
>     int next;
> }A[MAXN];
> int H[Mod];
> 
> int Hash(Node t)
> {
>     int ans = 0;
>     for(int i = 0; i < 6; i++)
>         ans += t.arm[i];
>     return ans%Mod;
> }
> 
> bool Judge(Node a, Node b)
> {
>     int i, j, k, cnt;
>     for(k = 0; k < 6; k++)
>         if(b.arm[k] == a.arm[0])
>             break;
>     cnt = 0;
>     for(i = 0, j = k; i < 6; i++, j++)
>     {
>         j %= 6;
>         if(a.arm[i] == b.arm[j]) cnt++;
>     }
>     if(cnt == 6)
>         return true;
>     cnt = 0;
>     for(i = 0, j = k; i < 6; i++, j--)
>     {
>         if(j < 0)   j = (j+6)%6;
>         if(a.arm[i] == b.arm[j]) cnt++;
>     }
>     if(cnt == 6)
>         return true;
>     return false;
> 
> }
> 
> bool InsertHash(Node t)
> {
>     int ha = Hash(t);
>     int a = H[ha];
>     bool flag = false;
>     if(a == -1) H[ha] = t.next;
>     else
>     {
>         while(1)
>         {
>             if( Judge(A[a], t) )
>                 flag = true;
>             a = A[a].next;
>             if(a == A[a].next)
>                 break;
>         }
>     }
>     if(flag)   return true;
>     A[a].next = t.next;
>     return false;
> }
> 
> int main()
> {
>     int N, cnt = 1;
>     scanf("%d", &N);
>     memset(H, -1, sizeof(H));
>     bool flag;
>     for(int i = 0; i < N; i++)
>     {
>         scanf("%d%d%d%d%d%d",&A[i].arm[0],&A[i].arm[1],&A[i].arm[2],&A[i].arm[3],&A[i].arm[4],&A[i].arm[5]);
>         A[i].next = i;
>         if(flag) continue;
>         else    flag = InsertHash(A[i]);
>     }
>     if(flag) printf("Twin snowflakes found.\n");
>     else printf("No two snowflakes are alike.\n");
>     return 0;
> }
> 
> /*
> 2
> 1 2 3 4 5 6
> 1 4 2 5 3 6
> // 上面这组数据很关键，过了的答案是相同
> 5
> 1 2 3 4 5 6
> 2 3 8 5 6 1
> 2 4 5 6 7 1
> 6 5 7 3 2 1
> 5 6 1 2 3 4
> */