stitch-a-ton/WebApp/Helper.cs

namespace WebApp;

public static class Helper
{
    public static string ToLetters(int number)
    {
        var result = "";
        while (number > 0)
        {
            number--; // Adjust for 1-based indexing
            char letter = (char)('A' + (number % 26));
            result = letter + result;
            number /= 26;
        }
        return result;
    }
}