Command system

commands = {}
commands["first"] = {
            ["second"] = {
                ["third"] = "Output message"}}

tbl = {}
tbl[1] = "first"
tbl[2] = "second"
tbl[3] = "third"

if type(commands[tbl[1]]) == "table" then
    if commands[tbl[1]][tbl[2]] ~= nil then
        if commands[tbl[1]][tbl[2]][tbl[3]] ~= nil then
            return processMessageHelper2( commands[tbl[1]][tbl[2]][tbl[3]] ) -- Wow, such shit!
        else
            return processMessageHelper2( commands[tbl[1]][tbl[2]] )
        end
    else
        return processMessageHelper2( commands[tbl[1]] )
    end
end