using System;

using System.Linq;

public class Program

{

    public static void Main()

    {

        int[] numbers = "12-15".Split('-')

        .Select(x => {

            int n;

            int.TryParse(x, out n);

            return n;

        })

        .ToArray();

        foreach(var n in numbers)

            Console.Write(n);

    }

}