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#include <cstdio>
#include <vector>
#include <algorithm>
#include <cstring>
using namespace std;
const int K = 2510;
const int maxn = 40010;
vector<int> courses[K];
char names[maxn][5];
bool cmp(int a, int b){return strcmp(names[a], names[b]) < 0;
}
int main() {int N,M;scanf("%d%d", &N, &M);for(int i = 0; i < N; i++){int num;scanf("%s %d", names[i], &num);for(int j = 0; j < num; j++){int id;scanf("%d", &id);courses[id].push_back(i);}}for(int i = 1; i <= M; i++){printf("%d %d\n", i, courses[i].size());sort(courses[i].begin(), courses[i].end(), cmp);for(int j = 0; j < courses[i].size(); j++){printf("%s\n", names[courses[i][j]]);}}return 0;
}