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#include <bits/stdc++.h>
using namespace std;
int main()
{
int n = 3;
vector<vector<int>> arr[n];
arr[0].push_back({1,2,3});
arr[0].push_back({4,5,6});
arr[0].push_back({7});
arr[0][2].push_back(8);
arr[0][2].push_back(9);
arr[1].push_back({10,11,11});
arr[1][0][2] = 12;
// cout << arr[1][0][0] ;
for (int i=0; i<n; i++) {
for (int j=0; j<arr[i].size(); j++) {
for (int k=0; k<arr[i][j].size(); k++)
cout << arr[i][j][k];
cout << " ";
}
cout << endl;
}
return 0;
}
