using System;
using System.Text.RegularExpressions;

class Program
{
    static void Main()
    {
	string input = "Blabla 11/moreBla 17-18";
	string[] s = Regex.Replace(input, @"[^\d\/]", "").Split('/');
        Console.WriteLine(s[0] + "." + s[1]);
    }
}