#include<stdio.h>
#include<vector>
#include<algorithm>
using namespace std;
int i,k,j,nr,n,sol;
vector<int> v;
int main()
{

    freopen("interclasari.in","r",stdin);
    freopen("interclasari.out","w",stdout);
    scanf("%d",&n);
    for(i=1;i<=n;i++)
    {

        scanf("%d",&k);
        sol+=k;
        for(j=1;j<=k;j++)
        {

            scanf("%d",&nr);
            v.push_back(nr);
        }
    }
    sort(v.begin(),v.end());
    printf("%d\n",sol);
    for(i=0;i<v.size();i++)
        printf("%d ",v[i]);
    return 0;
}