// URL: https://yukicoder.me/problems/no/158

import std.algorithm, std.array, std.container, std.math, std.range, std.typecons, std.string;

version(unittest) {} else
void main()
{
  int At, Ah, Ao; io.getV(At, Ah, Ao);
  int Db; io.getV(Db);
  int Bt, Bh, Bo; io.getV(Bt, Bh, Bo);
  int Dc; io.getV(Dc);
  int Ct, Ch, Co; io.getV(Ct, Ch, Co);

  auto a = W(At, Ah, Ao), b = W(Bt, Bh, Bo), c = W(Ct, Ch, Co);

  auto m = new int[][][](11, 101, 10001);
  foreach (i; 0..11)
    foreach (j; 0..101)
      m[i][j][] = -1;

  int calc(W a)
  {
    if (a.t == -1) return -1;
    if (m[a.t][a.h][a.o] != -1)
      return m[a.t][a.h][a.o];

    auto ab = payAndGet(a, Db, b);
    auto ac = payAndGet(a, Dc, c);

    return m[a.t][a.h][a.o] = max(calc(ab), calc(ac))+1;
  }

  io.put(calc(a));
}

struct W { int t, h, o; }

auto payAndGet(W a, int p, W g)
{
  auto pt = min(p/1000, a.t);
  a.t -= pt;
  p -= pt*1000;

  auto ph = min(p/100, a.h);
  a.h -= ph;
  p -= ph*100;

  if (p > a.o) return W(-1, -1, -1);

  a.o -= p;

  return W(a.t+g.t, a.h+g.h, a.o+g.o);
}

auto io = IO!()();
import std.stdio;
struct IO(string floatFormat = "%.10f", string delimiter = " ", alias IN = stdin, alias OUT = stdout)
{
  import std.conv, std.format, std.meta, std.traits;
  alias assignable = hasAssignableElements;

  auto getV(T...)(ref T v) { foreach (ref w; v) get(w); }
  auto getA(T)(size_t n, ref T v) if (assignable!T) { v = new T(n); foreach (ref w; v) get(w); }
  auto getC(T...)(size_t n, ref T v) if (allSatisfy!(assignable, T))
  {
    foreach (ref w; v) w = new typeof(w)(n);
    foreach (i; 0..n) foreach (ref w; v) get(w[i]);
  }
  auto getM(T)(size_t r, size_t c, ref T v) if (assignable!T && assignable!(ElementType!T))
  {
    v = new T(r); foreach (ref w; v) getA(c, w);
  }

  auto put(bool flush = false, T...)(T v)
  {
    foreach (i, w; v) { putA(w); if (i < v.length-1) OUT.write(delimiter); }
    OUT.writeln;
    static if (flush) OUT.flush();
  }
  auto putB(S, T)(bool c, S t, T f) { if (c) put(t); else put(f); }
  auto putRaw(T...)(T v) { OUT.write(v); OUT.writeln; }

  private
  {
    dchar[] buf;
    auto sp = (new dchar[](0)).splitter;
    void nextLine() { IN.readln(buf); sp = buf.splitter; }
    auto get(T)(ref T v) { if (sp.empty) nextLine(); v = sp.front.to!T; sp.popFront(); }

    auto putR(T)(T v)
    {
      auto w = v;
      while (!w.empty) { putA(w.front); w.popFront(); if (!w.empty) OUT.write(delimiter); }
    }
    auto putA(T)(T v)
    {
      static if (isInputRange!T && !isSomeString!T) putR(v);
      else if (isFloatingPoint!T) OUT.write(format(floatFormat, v));
      else OUT.write(v);
    }
  }
}