static void Main(string[] args)
{
SUBS subs = new SUBS();
string s1 = "987,654,321,000,987,654,321,000.0111111";
string s2 = "111,111,111,111,111,111,111,111.9";
Console.WriteLine(" {0}", s1);
Console.WriteLine(" {0}", s2);
Console.WriteLine(" -");
Console.WriteLine("{0}", subs.subs(s1, s2));
}