bitbybit.txt

#include<bits/stdc++.h>
using namespace std;

int main() {
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    cout.tie(NULL);
    
    int t;
    cin>>t;

    while(t--) {
        vector<string> setOne;
        vector<string> setTwo;

        int a,b,n,m;
        string s;

        cin>>a>>b>>n>>m;
        for(int i=0;i<n;i++) {
            cin>>s;
            setOne.push_back(s);
        }
        for(int i=0;i<m;i++) {
            cin>>s;
            setTwo.push_back(s);
        }

        long long elementsC = n + m;
        long long elementsP = n*m;
        long long t = elementsC * elementsP;

        cout<<t<<endl;
    }

    return 0;
}