#include <bits/stdc++.h>
#include <atcoder/all>
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 all(x) (x).begin(),(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=1<<30;


int main(){
    
    std::ifstream in("text.txt");
    std::cin.rdbuf(in.rdbuf());
    cin.tie(0);
    ios::sync_with_stdio(false);
    
    const int K=202;
    
    ll N,M;cin>>N>>M;
    vector<ll> A(K*K*K/2),B=A;
    
    for(int i=0;i<N;i++){
        ll a,b,c;cin>>a>>b>>c;
        A[a*K*K+b*K+c]=1;
        B[si(A)-1-(a*K*K+b*K+c)]=1;
    }
    auto C=atcoder::convolution(A,B);
    
    ll mi=INF;
    
    for(int i=0;i<M;i++){
        ll a,b,c;cin>>a>>b>>c;
        chmin(mi,C[si(A)-1+(a*K*K+b*K+c)]);
        //cout<<C[si(A)-1+(a*K*K+b*K+c)]<<endl;
    }
    
    cout<<N+N-mi<<endl;
}