#include<bits/stdc++.h>
#include<atcoder/all>
#define rep(i,n) for(int i=0;i<n;i++)
using namespace std;
using namespace atcoder;
typedef long long ll;
typedef vector<int> vi;
typedef vector<long long> vl;
typedef vector<vector<int>> vvi;
typedef vector<vector<long long>> vvl;
typedef long double ld;
typedef pair<int, int> P;

ostream& operator<<(ostream& os, const modint& a) {os << a.val(); return os;}
template <int m> ostream& operator<<(ostream& os, const static_modint<m>& a) {os << a.val(); return os;}
template <int m> ostream& operator<<(ostream& os, const dynamic_modint<m>& a) {os << a.val(); return os;}
template<typename T> istream& operator>>(istream& is, vector<T>& v){int n = v.size(); assert(n > 0); rep(i, n) is >> v[i]; return is;}
template<typename U, typename T> ostream& operator<<(ostream& os, const pair<U, T>& p){os << p.first << ' ' << p.second; return os;}
template<typename T> ostream& operator<<(ostream& os, const vector<T>& v){int n = v.size(); rep(i, n) os << v[i] << (i == n - 1 ? "\n" : " "); return os;}
template<typename T> ostream& operator<<(ostream& os, const vector<vector<T>>& v){int n = v.size(); rep(i, n) os << v[i] << (i == n - 1 ? "\n" : ""); return os;}
template<typename T> ostream& operator<<(ostream& os, const set<T>& se){for(T x : se) os << x << " "; os << "\n"; return os;}
template<typename T> ostream& operator<<(ostream& os, const unordered_set<T>& se){for(T x : se) os << x << " "; os << "\n"; return os;}
template<typename S, auto op, auto e> ostream& operator<<(ostream& os, const atcoder::segtree<S, op, e>& seg){int n = seg.max_right(0, [](S){return true;}); rep(i, n) os << seg.get(i) << (i == n - 1 ? "\n" : " "); return os;}
template<typename S, auto op, auto e, typename F, auto mapping, auto composition, auto id> ostream& operator<<(ostream& os, const atcoder::lazy_segtree<S, op, e, F, mapping, composition, id>& seg){int n = seg.max_right(0, [](S){return true;}); rep(i, n) os << seg.get(i) << (i == n - 1 ? "\n" : " "); return os;}

template<typename T> void chmin(T& a, T b){a = min(a, b);}
template<typename T> void chmax(T& a, T b){a = max(a, b);}

int solve(){
	int b, r, m;
	cin >> b >> r >> m;
	vector<int> end(b);
	vector<set<int>> G(r);
	rep(i, m){
		int u, v;
		cin >> u >> v;
		u--; v--;
		chmax(end[u], v);
		G[v].insert(u);
	}
	
	vector<vector<int>> event(r);
	rep(ib, b){
		event[end[ib]].push_back(ib);
	}
	
	vector<int> selected_r;
	vector<int> selected_b;
	vector<int> cnt(b);
	
	rep(ir, r){
		auto& vec = event[ir];
		vector<int> odd;
		vector<int> even;
		for(auto ib : vec){
			if(cnt[ib] % 2) odd.push_back(ib);
			else even.push_back(ib);
		}
		if(int(even.size()) + 1 < int(odd.size())){
			for(int ib : odd) selected_b.push_back(ib);
		}else{
			for(int ib : G[ir]) cnt[ib]++;
			for(int ib : even) selected_b.push_back(ib);
			selected_r.push_back(ir);
		}
	}
//	cout << cnt;
	cout << int(selected_b.size()) << ' ' << int(selected_r.size()) << "\n";
	for(int ib : selected_b) cout << ib + 1 << ' '; cout << "\n";
	for(int ir : selected_r) cout << ir + 1 << ' '; cout << "\n";
	return 0;
};

int main(){
	int t;
	cin >> t;
	rep(_, t) solve();
	return 0;
}