C31232233133313221211113313331333132313331322121111121111133313232212221   >>    C3123223313331322121111331333133313231333132212111112111113331323221222   <<    C31232233133313221211113313331333132313331322121111121111133313232212223   >>      C31232233133313221211113313331333132313331322121111121111133313232212222   >>