set set 1

#include <iostream>
#include <vector>
#include <set>
#include <string>
using namespace std;
int main() {
    int m, n, k,cnt=0;
    cin >> m >> n >> k;
    vector <set <int>> a;
    set <int> b;
    for (int x = 0; x<n; x++) a.push_back(b);
    for (int i =0; i<k; i++) {
        string s;
        cin >> s;
        int d,e;
        if (s=="ADD") {
            cin >> d >> e;
            a[e-1].insert(d);
        } else if (s=="LISTSET") {
            cin >> d;
            if (a[d-1].size()==0) cout << -1 << " ";
            else {
                for( auto  c : a[d-1]) cout << c << ' ';
            }
        } else if (s=="LISTSETSOF") {
            cin >> d;
            cnt=0;
            for ( int j = 0; j<a.size(); j++) {
                if (a[j].find(d)!=a[j].end()) {
                    cout << j+1 << " "; cnt++;
                }
            } if (cnt==0) cout << -1 << " ";
        }
    }
    return 0;
}