#include <bits/stdc++.h>
#include <cmath>

using namespace std;
typedef long long ll;
//typedef unsigned long long ll;

#define rep(i, n) for (int i = 0; i < (n); ++i)
//#define rep(i, n) for (ll i = 0; i < (n); ++i)
//#define sz(x) ll(x.size())
//typedef pair<ll, int> P;
typedef pair<ll, ll> P;
//const double INF = 1e10;
const ll INF = LONG_LONG_MAX / 10;
//const ll INF = 1e15;
const ll MINF = LONG_LONG_MIN;
//const int INF = INT_MAX / 10;
#define cmin(x, y) x = min(x, y)
#define cmax(x, y) x = max(x, y)
//typedef pair<int, int> P;
//typedef pair<double, double> P;

bool contain(set<P> &s, P a) { return s.find(a) != s.end(); }

//ifstream myfile("C:\\Users\\riku\\Downloads\\0_00.txt");
//ofstream outfile("log.txt");
//outfile << setw(6) << setfill('0') << prefecture << setw(6) << setfill('0') << rank << endl;
// std::cout << std::bitset<8>(9);


void print_line(vector<ll> &line) {
    if (line.size() == 0ll) {
        cout << endl;
        return;
    }
    for (ll i = 0; i < line.size(); i++) {
        cout << line[i];
        if (i == line.size() - 1) cout << endl;
        else cout << ' ';
    }
}


typedef priority_queue<long long, vector<long long>, greater<long long>> PQ_ASK;
const int mod = 1000000007;

int main() {
    multimap<string, ll> m;

    int n;
    cin >> n;
    rep(i, n) {
        int command;
        cin >> command;
        if (command == 0) {
            string key;
            cin >> key;

            ll v;
            cin >> v;
            m.insert({key, v});
        } else if (command == 1) {
            string key;
            cin >> key;

            auto p = m.equal_range(key);
            for (auto it = p.first; it != p.second; it++) {
                cout << it->second << endl;
            }
            
        } else if (command == 2) {
            string key;
            cin >> key;

            m.erase(key);
        } else if (command == 3) {
            string l, r;
            cin >> l >> r;

            for (auto it = m.lower_bound(l); it != m.end() && (*it).first <= r; it++) {
                printf("%s %lld\n", (*it).first.c_str(), (*it).second);
            }
        }
    }

}

