using System;

using System.Text.RegularExpressions;

public class Program

{

    public static void Main()

    {

        Regex regex =  new Regex("(.[^/]*)/(.*)");

        Match match = regex.Match("F216/654");

        if (match.Success)

        {

            foreach(var g in match.Groups)

            Console.WriteLine(g.ToString());

        }

    }

}