#include <bits/stdc++.h>
#include<fstream>

using namespace std;

priority_queue<int> q;

ifstream fin("interclasari.in");
ofstream fout("interclasari.out");

int main()
{
    int k ,i,L,cnt=0,j,x;
    fin>>k;
    for(i=1;i<=k;i++)
    {
        fin>>L;
        cnt+=L;
        for(j=1;j<=L;j++)
        {
            fin>>x;
            q.push(-x);
        }
    }
    fout<<cnt<<"\n";
    while(!q.empty())
    {
        fout<<-q.top()<<" ";
        q.pop();
    }
    return 0;
}