#include <bits/stdc++.h>

using namespace std;

const int MAXN = 1e5 + 5;

bool f[MAXN], vis[MAXN];
vector<int> g[MAXN];
int T, n, k, m, a[MAXN];

void Solve() {
  cin >> n >> k >> m;
  mt19937 rnd(time(0));
  for (int i = 1, u, v; i <= m; i++) {
    cin >> u >> v, g[u].push_back(v);
  }
  for (int i = 1; i <= n; i++) {
    sort(g[i].begin(), g[i].end());
    g[i].erase(unique(g[i].begin(), g[i].end()), g[i].end());
  }
  while (1) {
    int c1 = rnd() % k + 1, c2 = 0;
    for (int i = 1; i--; ) {
      int u;
      for (u = rnd() % k + 1; f[u]; u = rnd() % k + 1);
      f[u] = 1;
    }
    for (int i = 1; i <= n; i++) {
      vis[i] = 0;
      for (auto u : g[i]) {
        vis[i] ^= f[u];
      }
      c2 += vis[i];
    }
    if (c1 + c2 >= (n + k + 1) / 2) {
      cout << c1 << ' ' << c2 << '\n';
      for (int i = 1; i <= k; i++) {
        if (vis[i]) cout << i << " ";
      }
      cout << '\n';
      for (int i = 1; i <= n; i++) {
        if (f[i]) cout << i << " ";
        f[i] = 0, g[i].clear();
      }
      cout << '\n';
      return ;
    }
    for (int i = 1; i <= n; i++) {
      f[i] = 0;
    }
  }
}

int main() {
  ios::sync_with_stdio(0), cin.tie(0);
  for (cin >> T; T--; ) {
    Solve();
  }
  return 0;
}