clocks

program zC;

{$APPTYPE CONSOLE}

uses
  SysUtils;

type
  time = record
    h, s, m: string;
  end;

var
  f, x, y, z, a, b, h1, m1, s1, h2, m2, s2, lh, lm, ls, tt: integer;
  c: char;
  n, k: time;

function obr(s: string; len: integer): string;
begin
  while (length(s) < len) do s := '0' + s;
  obr := s;
end;

function timez(h, m, s: integer): time;
begin
  timez.h := obr(inttostr(h), lh);
  timez.m := obr(inttostr(m), lm);
  timez.s := obr(inttostr(s), ls);
end;

function check(a: time): boolean;
begin
  check := ((pos(c, a.h) <> 0) or (pos(c, a.m) <> 0) or (pos(c, a.s) <> 0));
end;

function incs(f: time): time;
var
  h, m, s, t: integer;
begin
  h := strtoint(f.h);
  m := strtoint(f.m);
  s := strtoint(f.s);
  t := h * a * b + m * b + s;
  inc(t);
  if (t = tt) then incs := timez(0, 0, 0)
  else
  begin
    h := t div (a * b);
    m := (t - h * a * b)div b;
    s := (t - h * a * b - m * b);
    incs := timez(h, m, s);
  end;
end;

function ll(k: integer): integer;
begin
  if (k div 10 = 0) then ll := 1
  else ll := 2;
end;

begin
  readln(a, b);
  readln(x, y, z);
  lh := ll(x); lm := ll(y); ls := ll(z);
  tt := x * a * b + y * b + z;
  readln(h1, m1, s1);
  readln(h2, m2, s2);
  readln(c);
  n := timez(h1, m1, s1);
  k := timez(h2, m2, s2);
  f := 0;
  while (true) do
  begin
    if (check(n)) then inc(f);
    if ((n.h = k.h) and (n.m = k.m) and (n.s = k.s)) then break;
    n := incs(n);
  end;
  writeln(f);
end.