rt

#include <bits/stdc++.h>
#define int long long
using namespace std;
string number[10000000];
signed main() {
	int n, k, sum = 0;
	cin >> n >> k;
	string kkk = to_string(k);
	for (int i = 1; i <= n; i++) {
		cin >> number[i];
	}
	for (int i = 1; i <= n; i++) {
		for (int j = i + 1; j <= n; j++) {
			string tmp1 = number[i] + number[j];
			if (tmp1 <= kkk) {
				sum++;
			}
			string tmp2 = number[j] + number[i];
			if (tmp2 <= kkk) {
				sum++;
			}
		}
	}
	cout << sum;
	return 0;
}