#include <iostream>
#include <fstream>
#include <algorithm>
#define MAX 20000002
using namespace std;
int n,k,v[MAX],s;

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

int main()
{
    fin >> k;
    int ans = 0;
    for(int i = 1; i <= k; i++){
        fin >> n;
        ans += n;
        for(int j = 1; j <= n; j++){
            fin >> v[++s];
        }
    }
    fout << ans << "\n";
    sort(v+1, v+s+1);
    for(int i = 1; i <= s; i++){
        fout << v[i] << " ";
    }
    return 0;
}