int [] input = Console.ReadLine().Split(' ').Select(int.Parse).ToArray();

for (int i =0;i< input.Length - 1; i++)
{
    Console.Write(input[i]);

    if (currentNumber < nextNumber)
    {
        if (i == input.Length - 2)
        {
            Console.Write(" " + input.[i+1]);
            break;
        }
        else
        {
            Console.Write(" ");
        }
    }
    else
    {
        Console.WriteLine();
    }
}