#include <bits/stdc++.h>
#include <atcoder/convolution>
using namespace std;
using ll = long long;
#define rep(i,n) for(int i=0;i<(int)(n);i++)

int main() {
  int N, M;
  cin >> N >> M;
  vector<int> A(N), B(N), C(N), X(M), Y(M), Z(M);
  rep(i, N) cin >> A[i] >> B[i] >> C[i];
  rep(i, M) cin >> X[i] >> Y[i] >> Z[i];
  int max_sz = 101 * 101 * 101;
  vector<int> V(max_sz, 0);
  rep(i, N) V[A[i] + B[i] * 101 + C[i] * 101 * 101] = 1;
  auto rV = V;
  reverse(rV.begin(), rV.end());
  auto res = atcoder::convolution(V, rV);
  int mx = N;
  rep(i, M) {
    int shf = X[i] + Y[i] * 101 + Z[i] * 101 * 101;
    mx = min(mx, res[max_sz - 1 + shf]);
  }
  cout << N * 2 - mx << endl;
}