#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
template<class T>bool chmax(T &a, const T &b) { if (a<b) { a=b; return true; } return false; }
template<class T>bool chmin(T &a, const T &b) { if (b<a) { a=b; return true; } return false; }
#define vi vector<int>
#define vl vector<ll>
#define vii vector<pair<int,int>>
#define vll vector<pair<ll,ll>>
#define vvi vector<vector<int>>
#define vvl vector<vector<ll>>
#define vvii vector<vector<pair<int,int>>>
#define vvll vector<vector<pair<ll,ll>>>
#define vst vector<string>
#define pii pair<int,int>
#define pll pair<ll,ll>
#define pb push_back
#define all(x) (x).begin(),(x).end()
#define mkunique(x) sort(all(x));(x).erase(unique(all(x)),(x).end())
#define fi first
#define se second
#define mp make_pair
#define si(x) int(x.size())
const int mod=998244353,MAX=300005,INF=15<<26;

#pragma GCC optimize("O3,unroll-loops")
#pragma GCC target("avx2,bmi,bmi2,lzcnt,popcnt")


mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());

int main(){
    
    std::ifstream in("text.txt");
    std::cin.rdbuf(in.rdbuf());
    cin.tie(0);
    ios::sync_with_stdio(false);
    
    int Q;cin>>Q;
    while(Q--){
        int X,Y,M;cin>>X>>Y>>M;
        vvi B(Y);
        for(int i=0;i<M;i++){
            int a,b;cin>>a>>b;a--;b--;
            B[b].pb(a);
        }
        if(X<=Y){
            cout<<0<<" "<<Y<<"\n";
            cout<<"\n";
            for(int i=1;i<=Y;i++) cout<<i<<" ";
            cout<<"\n";
            continue;
        }
        vi AA,BB;
        for(int i=0;i<Y/2;i++) AA.pb(1);
        for(int i=Y/2;i<Y;i++) AA.pb(0);
        for(int a:AA) BB.pb(a^1);
        
        while(1){
            shuffle(all(AA),rng);
            vi A(X);
            int cn=0;
            for(int i=0;i<Y;i++){
                if(AA[i]){
                    cn++;
                    for(int a:B[i]) A[a]^=1;
                }
            }
            for(int i=0;i<X;i++){
                if(A[i]) cn++;
            }
            
            if(cn+cn>=X+Y){
                vi S,T;
                for(int i=0;i<Y;i++){
                    if(AA[i]) T.pb(i);
                }
                for(int i=0;i<X;i++){
                    if(A[i]) S.pb(i);
                }
                cout<<si(S)<<" "<<si(T)<<"\n";
                for(int x:S) cout<<x+1<<" ";
                cout<<"\n";
                for(int x:T) cout<<x+1<<" ";
                cout<<"\n";
                break;
            }
            
            swap(AA,BB);
        }
    }
}