import sequtils,strutils,math
var
    A = stdin.readline.split.map(parseInt)
    B = stdin.readline.parseInt
    C = stdin.readline.split.map(parseInt)
    D = stdin.readline.parseInt
    E = stdin.readline.split.map(parseInt)
    dp : array[10010, array[11, array[101, int]]]
    As = A[0] * 1000 + A[1] * 100 + A[2]


for i in 1..As:
    for j in 0..10:
        var
            b1000 = B div 1000
            d1000 = D div 1000
        b1000 = min(b1000, j)
        d1000 = min(d1000, j)
        for k in 0..100:
            var
                m = i - j * 1000 - k * 100
            if i >= B:
                var
                    b100 = min((B - b1000 * 1000) div 100, k)
                    b = B - b100 * 100 - b1000 * 1000
                if b <= m:
                    dp[i][j][k] = 
                        max(dp[i][j][k],
                            dp[i - B + C[0] * 1000 + C[1] * 100 + C[2]][j + C[0] - b1000][k + C[1] - b100] + 1)
            if i >= D:
                var
                    d100 = min((D - d1000 * 1000) div 100, k)
                    d = D - d100 * 100 - d1000 * 1000
                if d <= m:
                    dp[i][j][k] =
                        max(dp[i][j][k],
                            dp[i - D + E[0] * 1000 + E[1] * 100 + E[2]][j + E[0] - d1000][k + E[1] - d100] + 1)
echo dp[As][A[0]][A[1]]