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

import std.algorithm, std.array, std.bitmanip, std.container, std.conv, std.format,
       std.functional, std.math, std.range, std.traits, std.typecons, std.stdio, 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(alias IN = stdin, alias OUT = stdout)
{
  import std.meta : allSatisfy;
  import core.stdc.stdlib : exit;

  void getV(T...)(ref T v)
  {
    foreach (ref w; v) get(w);
  }
  void getA(T)(size_t n, ref T v)
    if (hasAssignableElements!T)
  {
    v = new T(n);
    foreach (ref w; v) get(w);
  }
  void getC(T...)(size_t n, ref T v)
    if (allSatisfy!(hasAssignableElements, T))
  {
    foreach (ref w; v) w = new typeof(w)(n);
    foreach (i; 0..n) foreach (ref w; v) get(w[i]);
  }
  void getM(T)(size_t r, size_t c, ref T v)
    if (hasAssignableElements!T && hasAssignableElements!(ElementType!T))
  {
    v = new T(r);
    foreach (ref w; v) getA(c, w);
  }
  template getS(E...)
  {
    void getS(T)(size_t n, ref T v)
    {
      v = new T(n);
      foreach (ref w; v) foreach (e; E) mixin("get(w."~e~");");
    }
  }

  const struct PutConf
  {
    bool newline = true, flush, exit;
    string floatFormat = "%.10f", delimiter = " ";
  }

  void put(alias conf = "{}", T...)(T v)
  {
    mixin("const PutConf c = "~conf~"; putMain!c(v);");
  }
  void putB(alias conf = "{}", S, T)(bool c, S t, T f)
  {
    if (c) put!conf(t);
    else put!conf(f);
  }
  void 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;
    }
    void get(T)(ref T v)
    {
      if (sp.empty) nextLine();
      v = sp.front.to!T;
      sp.popFront();
    }

    void putMain(PutConf c, T...)(T v)
    {
      foreach (i, w; v) {
        putOne!c(w);
        if (i+1 < v.length) OUT.write(c.delimiter);
      }
      static if (c.newline) OUT.writeln;
      static if (c.flush) OUT.flush();
      static if (c.exit) exit(0);
    }
    void putOne(PutConf c, T)(T v)
    {
      static if (isInputRange!T && !isSomeString!T) putRange!c(v);
      else static if (isFloatingPoint!T) OUT.write(format(c.floatFormat, v));
      else static if (hasMember!(T, "fprint")) v.fprint(OUT);
      else OUT.write(v);
    }
    void putRange(PutConf c, T)(T v)
    {
      auto w = v;
      while (!w.empty) {
        putOne!c(w.front); w.popFront();
        if (!w.empty) OUT.write(c.delimiter);
      }
    }
  }
}