#include <vector>
#include <map>
#include <set>
#include <stack>
#include <queue>
#include <deque>
#include <algorithm>
#include <utility>
#include <functional>
#include <sstream>
#include <iostream>
#include <cstdio>
#include <cmath>
#include <cstdlib>
#include <cctype>
#include <string>
#include <cstring>
#include <ctime>
#include <climits>
using namespace std;
inline int toInt(string s) { int v; istringstream sin(s); sin >> v; return v;}
template<class T> inline string toString(T x) { ostringstream sout; sout << x; return sout.str();}
typedef vector<int> vi;
typedef vector<vi>  vvi;
typedef vector<string> vs;
typedef pair<int, int> pii;
typedef long long ll;
#define ALL(a) (a).begin(),(a).end()
#define RALL(a) (a).rbegin(),(a).rend()
#define EXIST(s,e) ((s).find(e)!=(s).end())
#define FOR(i,a,b) for(int i=(a);i<=(b);++i)
#define REP(i,n) FOR(i,0,n-1)
const double EPS = 1e-10;
const double PI = acos(-1.0);

int main() {
	string s;
	map<int, string> table;
	vs name;
	vi page;

	while(cin >> s) {
		int p;
		cin >> p;
		name.push_back(s);
		page.push_back(p);
		table[p] = s;
	}

	sort(ALL(name));
	sort(ALL(page));
	
	set<string> names;
	REP(i, name.size()) {
		names.insert(name[i]);
	}

	set<string>::iterator it = names.begin();
	while(it != names.end()) {
		cout << *it << endl;
		REP(i, page.size()) {
			if(table[page[i]] == *it) {
				cout << page[i] << " ";
			}
		}
		cout << endl;
		++it;
	}

	return 0;
}