#include <bits/stdc++.h>
using namespace std;
ifstream fin("interclasari.in");
ofstream fout("interclasari.out");
multiset <long long>ms;
multiset <long long> :: iterator it;
long long k,i,x,m,sum,j;
int main()
{
        fin>>k;
        for(i=1;i<=k;i++)
        {

        fin>>m;sum+=m;
        for(j=1;j<=m;j++)
        {
        fin>>x;
        ms.insert(x);

        }



        }
        fout<<sum<<endl;
        for(it=ms.begin();it!=ms.end();it++)
        fout<<*it<<' ';
    return 0;
}