#include <iostream>
#include <cstring>
#include <tuple>
using namespace std;

int memo[11][101][10001];

int a1000, a100, a1,
    db, b1000, b100, b1,
    dc, c1000, c100, c1;

tuple<int, int, int> how_to_pay(int sum, int num1000, int num100, int num1) {
    int use1000, use100, use1;
    use1000 = min(sum / 1000, num1000);
    sum -= use1000 * 1000;
    use100  = min(sum / 100,  num100);
    sum -= use100  * 100;
    use1    = min(sum / 1,    num1);
    sum -= use1    * 1;
    return make_tuple(use1000, use100, use1);
}

int solve(int num1000, int num100, int num1) {
    if (memo[num1000][num100][num1] >= 0) {
        return memo[num1000][num100][num1];
    } 

    // 貨幣を大きい方から使っていけば良い
    int res = 0, use1000, use100, use1;
    tuple<int, int, int> payment;
    // Bさんと交換
    payment = how_to_pay(db, num1000, num100, num1);
    use1000 = get<0>(payment);
    use100  = get<1>(payment);
    use1    = get<2>(payment);

    if (1000 * use1000 + 100 * use100 + use1 == db) {
        res = max(res, solve(num1000 - use1000 + b1000,
                             num100  - use100  + b100,
                             num1    - use1    + b1) + 1);
    } 

    payment = how_to_pay(dc, num1000, num100, num1);
    use1000 = get<0>(payment);
    use100  = get<1>(payment);
    use1    = get<2>(payment);

    if (1000 * use1000 + 100 * use100 + use1 == dc) {
        res = max(res, solve(num1000 - use1000 + c1000,
                             num100  - use100  + c100,
                             num1    - use1    + c1) + 1);
    } 

    return memo[num1000][num100][num1] = res;
}

int main() {
    cin >> a1000 >> a100 >> a1;
    cin >> db;
    cin >> b1000 >> b100 >> b1;
    cin >> dc;
    cin >> c1000 >> c100 >> c1;

    memset(memo, -1, sizeof(memo));
    cout << solve(a1000, a100, a1) << endl;

    return 0;
}