#include <bits/stdc++.h>
#define ll long long
#define vec vector
#define pb push_back
#define pll pair<ll, ll>
#define ss second
#define ff first
#define all(x) x.begin(), x.end()
using namespace std;
const ll inf = 3e5 + 5;
void _(){
ll k, n, ans = 0; cin >> n >> k;
unordered_map<string, bool>mp;
vec<string>a(n); for(string &s : a) {cin >> s; mp[s] = 1;}
for(ll i = 0; i < n; i++){
for(ll j = 0; j < i; j++){
string third = "";
for(ll kk = 0; kk < k; kk++){
if(a[i][kk] == a[j][kk]) third += a[i][kk];
else{
set<char>st = {'1', '2', '3'};
st.erase(a[i][kk]), st.erase(a[j][kk]);
third += *st.begin();
}
}
//cout << third << ' ' << i << ' ' << j << endl;
ans += mp[third];
}
} cout << ans / 3ll << endl;
}
signed main(){
ios_base::sync_with_stdio(0);
cin.tie(0); cout.tie(0);
ll t = 1;
while(t--) _();
}
