#include <bits/stdc++.h>
using namespace std;
#define pi acos(-1)
#define xx first
#define yy second
#define endl "\n"
#define lowbit(x) x & (-x)
#define int long long
#define ull unsigned long long
#define pb push_back
typedef pair<string, string> PII;
typedef pair<double, double> PDD;
#define max(a, b) (((a) > (b)) ? (a) : (b))
#define min(a, b) (((a) < (b)) ? (a) : (b))
#define Ysanqian ios::sync_with_stdio(false), cin.tie(0), cout.tie(0);
const int N = 1e6 + 10, M = 1010, inf = 0x3f3f3f3f, mod = 18446, P = 13331;
const double eps = 1e-8;
int n, ans;
PII p[N], t[N];
bool judge(string a, string b, string c)
{
  set<char> s[10];
  for (int i = 0; i < 4; i++)
    s[i].insert(a[i]), s[i].insert(b[i]), s[i].insert(c[i]);
  for (int i = 0; i < 4; i++)
    if (s[i].size() == 2)
      return false;
  return true;
}
bool check(PII a, PII b, PII c)
{
  for (int i = 0; i < (1 << 3); i++)
  {
    t[0] = a, t[1] = b, t[2] = c;
    for (int j = 0; j < 3; j++)
      if (i >> j & 1)
        swap(t[j].xx, t[j].yy);
    for (int j = 0; j < 3; j++)
      if (judge(t[0].xx, t[1].xx, t[2].xx) && judge(t[0].yy, t[1].yy, t[2].yy))
        return true;
  }
  return false;
}
void solve()
{
  cin >> n;
  for (int i = 1; i <= n; i++)
    cin >> p[i].xx >> p[i].yy;
  for (int i = 1; i <= n; i++)
    for (int j = i + 1; j <= n; j++)
      for (int k = j + 1; k <= n; k++)
        if (check(p[i], p[j], p[k]))
          ans++;
  cout << ans << endl;
}
signed main()
{
  Ysanqian;
  int T;
  T = 1;
  // cin >> T;
  while (T--)
    solve();
  return 0;
}