using System;

using System.Collections.Generic;

using System.Text;

public class Program

{

    public static void Main()

    {

        var address = "A*2,V*2,N*2,J*1,S*2,4*m,S*rAAAAAAAAAAAAA A*2,V*2,N*2,J*1,S*2,4*m,S*r";

        string[] addressLines = SplitAddress(address);

​

        for (int i = 0; i < addressLines.Length; i++)

        {

            Console.WriteLine("Line {0}: {1}", i+1, addressLines[i]);

        }

    }

    public static string[] SplitAddress(string address)

    {

        if (string.IsNullOrEmpty(address))

        {

            return new string[4] { "", "", "", "" };

        }

​

        List<string> addressLines = new List<string>();

        StringBuilder currentLine = new StringBuilder();

        string[] tokens = address.Split(new char[] { ' ', ',' }, StringSplitOptions.RemoveEmptyEntries);

        int currentLength = 0;

​

        for (int i = 0; i < address.Length; i++)

        {

            char currentChar = address[i];

​

            if (currentChar == ' ' || currentChar == ',')

            {

                if (currentLength + 1 <= 40)

                {

                    currentLine.Append(currentChar);

                    currentLength++;

                }

                else

                {

                    addressLines.Add(currentLine.ToString().Trim());

                    currentLine.Clear();

                    currentLine.Append(currentChar);

                    currentLength = 1;

                }

            }

            else

            {

                string token = tokens[0];

                tokens = tokens[1..];

​

                if (currentLength + token.Length <= 40)

                {

                    currentLine.Append(token);

                    currentLength += token.Length;

                }

                else

                {

                    addressLines.Add(currentLine.ToString().Trim());

                    currentLine.Clear();

                    currentLine.Append(token);

                    currentLength = token.Length;

                }

            }

​

            if (addressLines.Count == 4)

            {

                break;

            }

        }

​

        if (currentLine.Length > 0 && addressLines.Count < 4)

        {

            addressLines.Add(currentLine.ToString().Trim());

        }

​

        while (addressLines.Count < 4)

        {

            addressLines.Add("");

        }

​

        return addressLines.ToArray();

    }

}