u - t-t t-u y-t y---- i - y-y y-i u-y u---- u - t-t t-u y-t y---- i - y-y y-i u-y u---- o - o - t-y u - i-u y---- o - o - y-y u - u-t t---- o - o - t-y u - i-u y---- o - o - y-y u - u-t t---- u - t-t t-u y-t y---- i - y-y y-i u-y u---- u - t-t t-u y-t y---- i - y-y y-i u-y u---- o - o - t-y u - i-u y---- o - o - y-y u - u-t t---- o - o - t-y u - i-u y---- o - o - y-y u - u-t t---- u - t - t-u y-t y---- i - y - y-i u-y u---- u - t - t-u y-t y---- i - y - y-i u-y u---- o - o - t-y u - i-u y---- o - o - y-y u - u-t t---- o - o - t-y u - i-u y---- o - o - y-y u - u-t t