Go: package main

import (
	"bufio"
	"os"
	"strconv"
	"strings"
		"reflect"
	"fmt"
)

var scanner = bufio.NewScanner(os.Stdin)

func main() {
	// 上面の色を固定してから、左右方向に回転して一致するものがあるかを調べる
	round := [][]int{
		{1,2,3,4,5,6}, {1,3,5,2,4,6}, {1,4,2,5,3,6}, {1,5,4,3,2,6}, // c1を上面に固定して回転
		{2,6,3,4,1,5}, {2,3,1,6,4,5}, {2,1,4,3,6,5}, {2,4,6,1,3,5}, // c2を上面に固定して回転
		{3,1,2,5,6,4}, {3,2,6,1,5,4}, {3,5,1,6,2,4}, {3,6,5,2,1,4}, // c3を上面に固定して回転
		{4,1,5,2,6,3}, {4,2,1,6,5,3}, {4,5,6,1,2,3}, {4,6,2,5,1,3}, // c4を上面に固定して回転
		{5,1,3,4,6,2}, {5,3,6,1,4,2}, {5,4,1,6,3,2}, {5,6,4,3,1,2}, // c5を上面に固定して回転
		{6,2,4,3,5,1}, {6,3,2,5,4,1}, {6,5,3,4,2,1}, {6,4,5,2,3,1}, // c6を上面に固定して回転

	}
	for scanner.Scan() {
		n, _ := strconv.Atoi(scanner.Text())
		if n == 0 {
			break
		}
		cubes := make([][]string, n)
		for i := 0; i < n; i++ {
			scanner.Scan()
			cubes[i] = strings.Split(scanner.Text(), " ")
		}
		check := func(a, b int) bool {
			tmp := make([]string, 6)
			for i := 0; i < 24; i++ {
				for j := 0; j < 6; j++ {
					tmp[j] = cubes[b][round[i][j]-1]
				}
				if reflect.DeepEqual(tmp, cubes[a]) {
					return true
				}
			}
			return false
		}
		tbl := make([]int, n)
		// 全ての組み合わせを調べる
		for i := 0; i < n; i++ {
			if tbl[i] == 1 {
				continue
			}
			for j := i+1; j < n; j++ {
				if check(i, j) {
					tbl[j] = 1
				}
			}
		}
		fmt.Println(sum(tbl))
	}
}

func sum(a []int) int {
	ret := 0
	for _, v := range a {
		ret += v
	}
	return ret
}

C++: #include<algorithm>
#include<iostream>
#include<string>
#include<set>
using namespace std;
string a, b, c, d, e, f;
int n;
int main(){
  while(cin >> n, n){
    set<int> num;
    for(int i = 0;i < n;i++){
      if(a > f)swap(a, f), swap(b, e);
      cin >> a >> b >> c >> d >> e >> f;
      int p = (int)(b[0] + e[0]) * (int)(c[0] + d[0]) * (int)(a[0] + f[0]);
      if(((a<f) + (b<e) + (c<d)) % 2)p *= -1;
      num.insert(p);
    }
    cout << n - num.size() << endl;
  }
  return 0;
}

C++: #include<bits/stdc++.h>
using namespace std;
string s[31][6];
int c7(int a,int b){
  if(s[a][0]==s[b][0]&&s[a][1]==s[b][1]&&s[a][2]==s[b][2]&&s[a][3]==s[b][3]&&s[a][4]==s[b][4]&&s[a][5]==s[b][5])return 1;
  if(s[a][0]==s[b][0]&&s[a][1]==s[b][2]&&s[a][2]==s[b][3]&&s[a][3]==s[b][4]&&s[a][4]==s[b][1]&&s[a][5]==s[b][5])return 1;
  if(s[a][0]==s[b][0]&&s[a][1]==s[b][3]&&s[a][2]==s[b][4]&&s[a][3]==s[b][1]&&s[a][4]==s[b][2]&&s[a][5]==s[b][5])return 1;
  if(s[a][0]==s[b][0]&&s[a][1]==s[b][4]&&s[a][2]==s[b][1]&&s[a][3]==s[b][2]&&s[a][4]==s[b][3]&&s[a][5]==s[b][5])return 1;
  if(s[a][0]==s[b][1]&&s[a][1]==s[b][0]&&s[a][2]==s[b][3]&&s[a][3]==s[b][5]&&s[a][4]==s[b][2]&&s[a][5]==s[b][4])return 1;
  if(s[a][0]==s[b][1]&&s[a][1]==s[b][2]&&s[a][2]==s[b][0]&&s[a][3]==s[b][3]&&s[a][4]==s[b][5]&&s[a][5]==s[b][4])return 1;
  if(s[a][0]==s[b][1]&&s[a][1]==s[b][5]&&s[a][2]==s[b][2]&&s[a][3]==s[b][0]&&s[a][4]==s[b][3]&&s[a][5]==s[b][4])return 1;
  if(s[a][0]==s[b][1]&&s[a][1]==s[b][3]&&s[a][2]==s[b][5]&&s[a][3]==s[b][2]&&s[a][4]==s[b][0]&&s[a][5]==s[b][4])return 1;
  if(s[a][0]==s[b][2]&&s[a][1]==s[b][0]&&s[a][2]==s[b][4]&&s[a][3]==s[b][3]&&s[a][4]==s[b][5]&&s[a][5]==s[b][3])return 1;
  if(s[a][0]==s[b][2]&&s[a][1]==s[b][1]&&s[a][2]==s[b][0]&&s[a][3]==s[b][3]&&s[a][4]==s[b][4]&&s[a][5]==s[b][3])return 1;
  if(s[a][0]==s[b][2]&&s[a][1]==s[b][5]&&s[a][2]==s[b][1]&&s[a][3]==s[b][3]&&s[a][4]==s[b][0]&&s[a][5]==s[b][3])return 1;
  if(s[a][0]==s[b][2]&&s[a][1]==s[b][4]&&s[a][2]==s[b][5]&&s[a][3]==s[b][3]&&s[a][4]==s[b][1]&&s[a][0]==s[b][3])return 1;
  if(s[a][0]==s[b][5]&&s[a][1]==s[b][1]&&s[a][2]==s[b][2]&&s[a][3]==s[b][3]&&s[a][4]==s[b][4]&&s[a][5]==s[b][0])return 1;
  if(s[a][0]==s[b][5]&&s[a][1]==s[b][2]&&s[a][2]==s[b][3]&&s[a][3]==s[b][4]&&s[a][4]==s[b][1]&&s[a][5]==s[b][0])return 1;
  if(s[a][0]==s[b][5]&&s[a][1]==s[b][3]&&s[a][2]==s[b][4]&&s[a][3]==s[b][1]&&s[a][4]==s[b][2]&&s[a][5]==s[b][0])return 1;
  if(s[a][0]==s[b][5]&&s[a][1]==s[b][4]&&s[a][2]==s[b][1]&&s[a][3]==s[b][2]&&s[a][4]==s[b][3]&&s[a][5]==s[b][0])return 1;
  if(s[a][0]==s[b][4]&&s[a][1]==s[b][0]&&s[a][2]==s[b][3]&&s[a][3]==s[b][5]&&s[a][4]==s[b][2]&&s[a][5]==s[b][1])return 1;
  if(s[a][0]==s[b][4]&&s[a][1]==s[b][2]&&s[a][2]==s[b][0]&&s[a][3]==s[b][3]&&s[a][4]==s[b][5]&&s[a][5]==s[b][1])return 1;
  if(s[a][0]==s[b][4]&&s[a][1]==s[b][5]&&s[a][2]==s[b][2]&&s[a][3]==s[b][0]&&s[a][4]==s[b][3]&&s[a][5]==s[b][1])return 1;
  if(s[a][0]==s[b][4]&&s[a][1]==s[b][3]&&s[a][2]==s[b][5]&&s[a][3]==s[b][2]&&s[a][4]==s[b][0]&&s[a][5]==s[b][1])return 1;
  if(s[a][0]==s[b][3]&&s[a][1]==s[b][0]&&s[a][2]==s[b][4]&&s[a][3]==s[b][3]&&s[a][4]==s[b][5]&&s[a][5]==s[b][2])return 1;
  if(s[a][0]==s[b][3]&&s[a][1]==s[b][1]&&s[a][2]==s[b][0]&&s[a][3]==s[b][3]&&s[a][4]==s[b][4]&&s[a][5]==s[b][2])return 1;
  if(s[a][0]==s[b][3]&&s[a][1]==s[b][5]&&s[a][2]==s[b][1]&&s[a][3]==s[b][3]&&s[a][4]==s[b][0]&&s[a][5]==s[b][2])return 1;
  if(s[a][0]==s[b][3]&&s[a][1]==s[b][4]&&s[a][2]==s[b][5]&&s[a][3]==s[b][3]&&s[a][4]==s[b][1]&&s[a][5]==s[b][2])return 1;
  return 0;
}
int main(){
  int n;
  while(cin>>n,n){
    int sum=0;
    for(int i=0;i<n;i++)
      for(int j=0;j<6;j++)
        cin>>s[i][j];
    for(int i=0;i<n;i++){
      int p=0;
      for(int j=i+1;j<n;j++){
        if(c7(i,j))p++;
      }
      if(p)sum++;
    }
    cout<<sum<<endl;
  }
}