using System;
class Program
{
static void Main() {
string s = "c# c++*c vb.net*java python";
string s1 = "c++";
string s2 = "java";
int s1Index = s.IndexOf(s1);
int s2Index = s.IndexOf(s2);
string subs = s.Substring(s1Index + s1.Length, s2Index - s1Index - s1.Length);
Console.WriteLine(subs);
}
}
/*
run:
*c vb.net*
*/