#define HAVE_STRUCT_TIMESPEC

 #include<bits/stdc++.h>

 using namespace std;

 string s[];

 vector<string>v[];

 int main(){

     ios::sync_with_stdio(false);

     cin.tie(NULL);

     cout.tie(NULL);

     int n,k;

     cin>>n>>k;

     for(int i=;i<=n;++i){

         cin>>s[i];

         int x;

         cin>>x;

         for(int j=;j<=x;++j){

             int y;

             cin>>y;

             v[y].push_back(s[i]);

         }

     }

     for(int i=;i<=k;++i)

         sort(v[i].begin(),v[i].end());

     for(int i=;i<=k;++i){

         cout<<i<<" "<<v[i].size();

         for(auto it:v[i])

             cout<<"\n"<<it;

         if(i!=k)

             cout<<"\n";

     }

     return ;

 }