#include <bits/stdc++.h>
#define FOR(i, x, y) for (int i = x; i < y; i++)
typedef long long ll;
using namespace std;
unordered_map<ll, ll> cnt[16];
int main() {
ios_base::sync_with_stdio(0);
cin.tie(0);
ll n, d;
cin >> n >> d;
FOR(i, 0, n) {
string s;
cin >> s;
FOR(j, 0, 16) {
ll hsh = 0;
FOR(k, 0, 4) if (j & (1 << k))
hsh += ll(s[k] - '0' + 1) << (k * 10);
cnt[j][hsh]++;
}
}
ll ans = 0;
FOR(i, 0, 16) {
if (4 - __builtin_popcount(i) > d) continue;
ll contrib = 0;
for (pair<ll, ll> j : cnt[i])
contrib += j.second * (j.second - 1) / 2;
if ((d - 4 + __builtin_popcount(i)) & 1) ans -= contrib;
else ans += contrib;
}
cout << ans;
return 0;
}
