PAT 1047

#include<cstdio>
#include<cstring>
#include<algorithm>
#include<vector>
using namespace std;

const int MAXN=40010;

char name[MAXN][5];
vector<int> course[2510];

bool cmp(int a,int b)
{
	return strcmp(name[a],name[b])<0;
}
int main()
{
	int n,k;
	scanf("%d%d",&n,&k);
	int course_id,num;
	for(int i=0;i<n;i++)
	{
		scanf("%s %d",name[i],&num);
		for(int j=1;j<=num;j++)
		{
			scanf("%d",&course_id);
			course[course_id].push_back(i);
		}
	}	

	for(int i=1;i<=k;i++)
	{
		printf("%d %d\n",i,course[i].size());
		
		sort(course[i].begin(),course[i].end(),cmp);
		
		
		for(int j=0;j<course[i].size();j++)
		{
			printf("%s\n",name[course[i][j]]);
		}
	}
	system("pause");
	return 0;
}