Numb Converter

local tArg = {..}
local key = tArg[1]
local Result = -1
if key == "one" then
	Result = 1
elseif key == "two" then
	Result = 2
elseif key == "three" then
	Result = 3
elseif key == "four" then
	Result = 4
elseif key == "five" then
	Result = 5
elseif key == "six" then
	Result = 6
elseif key == "seven" then
	Result = 7
elseif key == "eight" then
	Result = 8
elseif key == "nine" then
	Result = 9
elseif key == "zero" then
	Result = 0
else
	Result = -1
end

return(Result)