#include <bits/stdc++.h>
using namespace std;
const long long N = 5e2 + 5, inf = 1e17 + 5, mod = 998244353;
int main()
{
ios_base::sync_with_stdio(0), cin.tie(NULL), cout.tie(NULL);
int n, kk;
cin >> n >> kk;
vector<string> arr(n);
map<string, int> mp;
for (int i = 0; i < n; i++)
cin >> arr[i], mp[arr[i]]++;
int cnt = 0;
for (int i = 0; i < n - 1; i++)
{
mp[arr[i]]--;
for (int j = i + 1; j < n; j++)
{
mp[arr[j]]--;
string need = "";
for (int k = 0; k < kk; k++)
{
if (arr[i][k] == arr[j][k])
need.push_back(arr[i][k]);
else if (arr[i][k] != '1' && arr[j][k] != '1')
need.push_back('1');
else if (arr[i][k] != '2' && arr[j][k] != '2')
need.push_back('2');
else if (arr[i][k] != '3' && arr[j][k] != '3')
need.push_back('3');
}
cnt += mp[need];
}
for (int j = i + 1; j < n; j++)
mp[arr[j]]++;
}
cout << cnt;
}
