using System;

using System.Data;

​

public class Program

{

    public static void Main()

    {

        String s ="6,44 6,35    +0,63asd    4,27fgh 4,14  45,6 +777,4cvbvc";

        int k = s.Length;

         for (int i = 1; i < k; i++)

            if (char.IsDigit(s[i - 1]) && char.IsLetter(s[i]))

                s = s.Insert(i, "\n");

          Console.WriteLine(s);

    }

​

}