#include <bits/stdc++.h>
using namespace std;
 
using ll = long long;
using ld = long double;
#define FOR(i, m, n) for (int i = (m); i < (n); i++)
#define FORR(i, m, n) for (int i = (m); i >= (n); i--)
#define REP(i, n) FOR(i, 0, (n))
#define REPR(i, n) FORR(i, (n) - 1, 0)
#define REP1(i, n) FOR(i, 1, (n) + 1)
#define REPS(c, s) for (char c : s)
#define ALL(c) (c).begin(), (c).end()
#define SORT(c) sort(ALL(c))
#define REV(c) reverse(ALL(c))
#define sz(v) (int)v.size()
#define Q int q; cin >> q; while (q--)
#define endl '\n'
template<class T> inline bool chmin(T& a, T b) {if (a > b) {a = b; return true;} return false;}
template<class T> inline bool chmax(T& a, T b) {if (a < b) {a = b; return true;} return false;}
template<class T> inline void printv(vector<T>& v) {int n = sz(v); REP(i, n) cout << v[i] << (i == n - 1 ? endl : ' ');}
const int MOD = 1000000007;
const int INF = 1000000001;
const ll LINF = 1000000001000000001LL;
 
void solve();
 
int main() {
    ios::sync_with_stdio(false);
    cin.tie(nullptr);
    cout << fixed << setprecision(numeric_limits<double>::max_digits10);
    solve();
    return 0;
}

void solve() {
    multimap<string, int> m;
    Q {
        int c;
        string k;
        cin >> c >> k;
        if (c == 0) {
            int y;
            cin >> y;
            m.emplace(k, y);
        } else if (c == 1) {
            auto range = m.equal_range(k);
            for (auto itr = range.first; itr != range.second; itr++) cout << (*itr).second << endl;
        } else if (c == 2) {
            m.erase(k);
        } else if (c == 3) {
            string y;
            cin >> y;
            auto st = m.lower_bound(k);
            auto ed = m.upper_bound(y);
            for (;st != ed; st++) cout << (*st).first << " " << (*st).second << endl;
        }
    }
}

