For Reddit easy challenge 295

Letter_by_letter.cs

using System;

class Program
{
    static void Main(string[] args)
    {
        string input1 = Console.ReadLine();
        string input2 = Console.ReadLine();
        Console.Clear();
            
        for(int i = 0; i <= input1.Length; i++)
        {
            Console.Write(input2.Substring(0, i));
            Console.Write(input1.Substring(i));
            Console.WriteLine();
        }

        Console.ReadKey();
    }
}

For Reddit Easy Challenge 295