#include <bits/stdc++.h>   using namespace std;   int n, m, a[1000000];   long long bank;   vector<int> t;   int main() {     cin >> n >> m;     for (int i = 0, k; i < n; i++) {       cin >> k;       int p = -1;       bool q = false;       for (int j = 0; j < k; j++) {         cin >> a[j];         if (a[j] < m) p = 1;       }       if (p == true) {         t.push_back(i);         bank++;       }     }     cout << bank << endl;     for (int i = 0; i < t.size(); i++) cout << t[i] + 1 <<    ;   }   