#include <bits/stdc++.h>
using namespace std;
#define int long long // a.k.a. TLE creator
#define all(x) x.begin(), x.end()
template<class A, class B> istream& operator >>(istream &o, pair<A, B> &x){return o >> x.first >> x.second;}
template<class A, class B> ostream& operator <<(ostream &o, pair<A, B> &x){return o << x.first << ' ' << x.second << ' ';}
void setIO(){ios::sync_with_stdio(false); cin.tie(0);}
const int INF = INT_MAX, MOD = 998244353, N = 1e6, K = __lg(N) + 1;
signed main(){
setIO();
int n, k;
cin >> n >> k;
int pw[k + 1]{1};
for(int i = 1; i <= k; i++)pw[i] = pw[i - 1] * 10;
vector<int> s(n);
for(auto &i : s)cin >> i;
map<int, int> cnt;
for(int i = 0; i < n; i++){
for(int j = i + 1; j < n; j++){
int now = 0, x = s[i], y = s[j];
for(int l = 0; l < k; l++, x /= 10, y /= 10){
if(x % 10 == y % 10)now += x % 10 * pw[l];
else{
for(int c = 1; c <= 3; c++){
if(x % 10 != c && y % 10 != c)now += c * pw[l];
}
}
}
cnt[now]++;
}
}
int ans = 0;
for(auto i : s){
ans += cnt[i];
}
cout << ans / 3;
}
