#include <iostream>
#include <cstring>
#include <algorithm>
#include <vector>
#include <string>
//上网统计

using namespace std;

struct Node
{
    string username;
    vector<string> webpage;
};//自定义结构体类型
vector<Node> v;//动态数组

int main()
{
    int n,m;
    cin>>n>>m;
    string username,webpage;
    for(int i=0;i<m;i++)
    {
        cin>>username>>webpage;
        bool flag=false;
        for(int j=0;j<v.size();j++)//判断先前是否存在用户
        {
            if(v[j].username==username)
            {
                v[j].webpage.push_back(webpage);
                flag=true;
                break;
            }
        }
        if(!flag)
        {
            Node newnode;//创建新的节点
            newnode.username=username;
            newnode.webpage.push_back(webpage);
            v.push_back(newnode);
        }
    }
    for(int i=0;i<v.size();i++)
    {
        cout<<v[i].username;
        for(int j=0;j<v[i].webpage.size();j++)
        {
            cout<<" "<<v[i].webpage[j];
        }//两层输出
        cout<<endl;
    }
    return 0;
}