local alp = {"a","b","c","d","e","f","g","h","i","j","k","l","m","n","o","p","q","r","s","t","u","v","w","x","y","z","A","B","C","D","E","F","G","H","I","J","K","L","M","N","O","P","Q","R","S","T","U","V","W","X","Y","Z"}
local num = 1
local str = alp[num]

repeat
    num = num + (1*#str)
    if #str == 1 then
        str = alp[num]
    end
    if num >= math.ceil((math.pow(#alp, #str))) then
        print(num)
        num = 1
        str = str .. alp[math.ceil(num/(math.pow(#alp, #str)))]
    end
    print(str)
    print("------")
    print(alp[math.ceil(num/(math.pow(2, #str - 1)))])
    print(num)
    print("------")
until false