tostring, setmetatable, rawset, pairs, ipairs, type;
local io_open, io_write = io.open, io.write;
local math_max, rep = math.max, string.rep;
local os_date, os_getenv = os.date, os.getenv;
tostring, setmetatable, rawset, pairs, ipairs, type;
local io_open, io_write = io.open, io.write;
local math_max, rep = math.max, string.rep;
local os_date, os_getenv = os.date, os.getenv;