program del_na_seba;

{$APPTYPE CONSOLE}

uses
  SysUtils;

var
   n,m,i,j,p:integer;
procedure del(n:integer; var p:integer);
begin
   p:=1;
   while(n<>0)do begin
      p:=p*(n mod 10);
      n:=n div 10;
   end;
end;
begin
   readln(n,m);
   j:=0;
   i:=n;
   while(i<=m) do begin
      if(i>99)then break;
      if(i mod 10=0)then inc(i);
      if(i>m)then break;
      del(i,p);
      if(i mod p=0)then inc(j);
      inc(i);
   end;
   writeln(j);
   readln;
end.