#include <bits/stdc++.h>
using namespace std;

#define ll long long
mt19937_64 rng(chrono::steady_clock::now().time_since_epoch().count());

bool isprime(int n) {
    if (n <= 1)
        return false;
    for (int i = 2; i * i <= n; i++) {
        if (n % i == 0)
            return false;
    }
    return true;
}
int findPrime(int n) {
    while (!isprime(n)) n++;
    return n;
}

void solve() {
    ll n, k;
    cin>>n>>k;
    vector<ll> a(n+1);
    vector<string> s(n+1);
    for (int i = 1; i <= n; i++) {
        cin>>s[i];
    }
    ll ans = 0;
    for (int t = 0; t <= 3; t++) {
        int M = 9e8, M1 = 1e8;
        int mod = findPrime(rng() % M + M1);
        ll target = 0;
        for (int i = 1; i <= k; i++) {
            target = target*10 + 9;
            target %= mod;
        }
        target = target * t % mod;
        for (int i = 1; i <= n; i++) {
            ll val = 0;
            for (auto ch : s[i]) {
                val = val * 10 + ch-'0';
                val %= mod;
            }
            a[i] = val;
        }
        for (int i = 1; i <= n; i++) {
            for (int j = i; j <= n; j++) {
                for (int k = j; k <= n; k++) {
                    if ((a[i] + a[j] + a[k])%mod == target) {
                        ans++;
                    }
                }
            }
        }
    }
    cout<<ans<<'\n';
}

int main() {
    if (ifstream("test.in")) {
        freopen("test.in", "r", stdin);
        freopen("test.out", "w", stdout);
    }
    ios::sync_with_stdio(false);
    cin.tie(0);
    int T = 1;
    // cin>>T;
    while (T--) {
        solve();
    }
    return 0;
}