#include <fstream>
#include <algorithm>

using namespace std;
int k,i,n,v[20000001],s,j,x;
int main()
{
    ifstream f("interclasari.in");
    ofstream g("interclasari.out");
    f>>k;
    for(i=1;i<=k;i++)
        {
            f>>n;
            s+=n;
            for(j=1;j<=n;j++)
                f>>v[++x];
        }
g<<s<<"\n";
sort(v+1,v+x+1);
for(i=1;i<=x;i++)
    g<<v[i]<<" ";


    return 0;
}