Pr8R3ex16

using System;
using System.Text;


namespace test
{
    class Program
    {
        static int ifMarks (char a, char [] m)
        {
            int x = 0;
            for (int i = 0; i < m.Length; i++)
                if (a == m [i])
                    x += 1;
            return x;
        }

        static void Main()
        {
            string a = Console.ReadLine ();
            StringBuilder str = new StringBuilder (a);
            char[] marks = { '.', '?', '!', ';', ':', ',' };
            int i = 0;
            while (i != str.Length - 1) {
                int k = i + 1;
                if (ifMarks (str [k], marks) == 1 && str [k - 1] == ' ') {
                    str.Remove (k - 1, 1);
                    i -= 2;
                }
                if (ifMarks (str [i], marks) == 1 && str [i + 1] != ' ') {
                    str.Insert (i + 1, ' ');
                    i++;
                }

                i++;
            }
            Console.WriteLine ("New string = {0}", str);
        }
    }
}