--              0123456789abcdefghijklmnopqrstuvwxyz
local cipher = "1234567890qwertyuiopasdfghjklzxcvbnm"

local function encrypt(str)
	str = str:gsub("%d",function(a) a=a:byte()-47 return cipher:sub(a,a) end)
	str = str:gsub("%l",function(a) a=a:byte()-86 return cipher:sub(a,a) end)
	return str
end

local function decrypt(str)
	str = str:gsub("%d",function(a) return string.char(cipher:find(a,nil,true)+47) end)
	str = str:gsub("%l",function(a) return string.char(cipher:find(a,nil,true)+86) end)
	return str
end