using System;
 
namespace ConsoleApp
{
    class Program
    {
        static void Main(string[] args)
        {
            splits("Hello world!");
        }
 
        static void splits(string str)
        {
            int i = 0;
            int count = 0;
            string[] sent = new string[2];
            string buff = "";
            str += " ";
            while (i < str.Length)
            {
                if (str[i] == ' ')
                {
                    sent[count] = buff;
                    count++;
                    buff = "";
                }
                buff += str[i];
                i++;
            }
 
            for (int z = 0; z < sent.Length; z++)
            {
                Console.WriteLine(sent[z].Trim());
            }
        }
    }
}
 

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