C11112331312111112111133133313331333132323213311211111232212121   >>    C1111233131211111211113313331333133313232321331121111123221212   <<    C11112331312111112111133133313331333132323213311211111232212123   >>      C11112331312111112111133133313331333132323213311211111232212122   >>