function tinsert(t,i)
	return table.insert(t,i)
end

function strsub(...)
	return string.sub(unpack(arg))
end

function gsub(...)
	return string.gsub(unpack(arg))
end

function writeto(s)
	if(s ~= nil) then
		io.output(s)
	end
end

function write(s)
	if s then
		io.write(s)
	end
end

function readfrom(s)
	if(s ~= nil) then
		io.input(s)
	end
end

function read(s)
	local h = io.read(s)
	return h
end

function getn(t)
	return table.getn(t)
end

function date(d)
	return os.date(d)
end

function sort(a,b)
	return table.sort(a,b)
end

function strlower(s)
	return string.lower(s)
end