#include <iostream>
#include <vector>
using namespace std;
using ll = long long;

int main(){
    ll H, W;
    cin >> H >> W;
    vector<vector<ll>> A(H, vector<ll>(W));
    for (ll i = 0; i < H; i++){
        for (ll j = 0; j < W; j++){
            cin >> A[i][j];
        }
    }
    ll Q;
    cin >> Q;
    vector<ll> X(Q);
    for (ll i = 0; i < Q; i++){
        cin >> X[i];
    }
    vector<ll> B;
    for (ll i = 0; i < H; i++){
        for (ll j = 0; j < W; j++){
            B.push_back(A[i][j]);
        }
    }
    ll len = H * W;
    vector<ll> now_x(Q);
    for (ll i = 0; i < Q; i++){
        now_x[i] = X[i];
    }
    vector<vector<ll>> vecs(len + Q, vector<ll>(len));
    for (ll i = 0; i < len; i++){
        vecs[i][i] = 1;
    }
    for (ll i = 0; i < len; i++){
        ll msb = -1;
        for (ll j = 0; j < 60; j++){
            if ((B[i] >> j) & 1){
                msb = j;
            }
        }
        if (msb == -1){
            continue;
        }
        for (ll j = i + 1; j < len; j++){
            if ((B[j] >> msb) & 1){
                B[j] ^= B[i];
                for (ll k = 0; k < len; k++){
                    vecs[j][k] ^= vecs[i][k];
                }
            }
        }
        for (ll j = 0; j < Q; j++){
            if ((now_x[j] >> msb) & 1){
                now_x[j] ^= B[i];
                for (ll k = 0; k < len; k++){
                    vecs[len + j][k] ^= vecs[i][k];
                }
            }
        }
    }

    for (ll i = 0; i < Q; i++){
        if (X[i] == 0){
            cout << 3 << endl;
            cout << 1 << " " << 1 << endl;
            cout << 1 << " " << 2 << endl;
            cout << 1 << " " << 1 << endl;
            cout << 1 << " " << 2 << endl;
            continue;
        }
        if (now_x[i] != 0){
            cout << -1 << endl;
            continue;
        }
        vector<vector<ll>> moves(H);
        for (ll j = 0; j < len; j++){
            if (vecs[len + i][j] == 1){
                ll h = j / W;
                ll w = j % W;
                moves[h].push_back(w);
            }
        }
        ll now_y = 0;
        vector<pair<ll, ll>> ans;
        for (ll i = 0; i < H; i++){
            if (moves[i].size() == 0){
                continue;
            }
            ll len_moves = moves[i].size();
            for (ll j = 0; j < len_moves; j++){
                ans.push_back(make_pair(i, moves[i][j]));
            }
        }
        ll K = ans.size() - 1;
        cout << K << endl;
        for (ll i = 0; i < K + 1; i++){
            cout << ans[i].first + 1 << " " << ans[i].second + 1 << endl;
        }
    }
}