#include  <iostream>
using namespace std;
int main()
{
  int n,maxlen=0,i,j,k; cin >> n;int len[i],intmin=-1000;
  for (i=0;i<n;i++)
  {
      cin >> len[i]; if (len[i]>maxlen) maxlen=len[i];
  }
  int a[n][maxlen];
  for (i=0;i<n;i++)
  {
       for (k=0;k<len[i];k++)
          cin >> a[i][k];
       for (j=k;j<maxlen;j++)
        a[i][j]=intmin;
  }
   /*for (i=0;i<n;i++)
   {
       for (k=0;k<maxlen;k++)
        cout << a[i][k] << " ";
       cout << endl;
   }
*/

   for (k=0;k<maxlen;k++)
   {
       bool f=true;
     for (i=0;i<n;i++)
   {
       if (a[i][k]>=0) f=false;
   }
     if (f) cout << k+1 << " ";
   }
}