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#include<bits/stdc++.h>
using namespace std;
ifstream fin("interclasari.in");
ofstream fout("interclasari.out");
vector <int> v;
int n, i, s, query,poz,j;
int main(){
ios::sync_with_stdio(false);
fin.tie(0);
fin>>query;
for(i=1;i<=query;i++){
fin>>n;
s+=n;
for(j=1;j<=n;j++){
fin>>poz;
v.push_back(poz);
}
}
fout<<s<<"\n";
sort(v.begin(), v.end());
for(i=0;i<v.size();i++)
fout<<v[i]<<" ";
}