using System;
class Program
{
static void Main() {
string s = "vb.net javascript php c c++ python c#";
int pos1 = s.LastIndexOf(" ");
int pos2 = s.LastIndexOf(" ", pos1 - 1);
Console.WriteLine(pos1); // debug
Console.WriteLine(pos2); // debug
string word = pos2 > -1 ? s.Substring(pos2 + 1, pos1 - pos2) : s;
Console.WriteLine(word);
}
}
/*
run:
34
27
python
*/