#include<iostream>
#include<algorithm>
#include <cstring>
#include<vector>

using namespace std;

const int N = 2510;


int n,k;
vector<string> lesson[N];

int main()
{
    scanf("%d%d",&n,&k);
    char str[5];
    while(n--)
    {
        int cnt;
        scanf("%s%d",str,&cnt);
        while(cnt--)
        {
            int l;
            scanf("%d",&l);
            lesson[l].push_back(str);
        }
    }
    for(int i = 1; i<=k; i++)
    {
        printf("%d %d\n",i,lesson[i].size());
        sort(lesson[i].begin(),lesson[i].end());
        for(auto id:lesson[i])
            printf("%s\n",id.c_str());
    }
    return 0;
}