local api = {}

local function xzbounds(num)
    return num > -10001 and num < 10001
end

local function ybounds(num)
    return num > -65 and num < 321
end

api.checkBounds = function(x, y, z)
    x, y, z = tonumber(x), tonumber(y), tonumber(z)
    if not x then
        return false, "Value x is not a number."
    elseif not y then
        return false, "Value y is not a number."
    elseif not z then
        return false, "Value z is not a number."
    elseif not xzbounds(x) then
        return false, "Value x = "..x.." is out of bounds."
    elseif not ybounds(y) then
        return false, "Value y = "..y.." is out of bounds."
    elseif not xzbounds(z) then
        return false, "Value z = "..z.." is out of bounds."
    end
    return true, x, y, z
end

return api