#include <bits/stdc++.h>
using namespace std;
int op (string a, string b) {
int ret = 0;
for (int i = 0; i < (int)a.length(); i++) {
ret *= 3;
if (a[i] == b[i]) ret += a[i] - '0';
else {
set <char> x = {'1', '2', '3'};
x.erase(a[i]); x.erase(b[i]);
ret += *(x.begin()) - '0';
}
}
return ret;
}
int freq[6563];
string arr[2188];
int hashh (string s) {
reverse(s.begin(), s.end());
int cnt = 0;
while (s.length()) {
cnt *= 3;
cnt += (s.back() - '0');
s.pop_back();
}
return cnt;
}
int main () {
int n, m;
cin >> n >> m;
for (int i = 0; i < n; i++) cin >> arr[i];
for (int i = 0; i < n; i++) freq[hashh(arr[i])]++;
long long ans = 0;
for (int i = 0; i < n; i++) {
for (int j = 0; j < n; j++) {
if (i == j) continue;
ans += freq[op(arr[i], arr[j])];
if (arr[i] == arr[j]) ans -= 2;
}
}
ans /= 6;
cout << ans << '\n';
}
