C11112331312111112111133133313231333132313331333221333131133132312323221212121   >>    C1111233131211111211113313331323133313231333133322133313113313231232322121212   <<    C11112331312111112111133133313231333132313331333221333131133132312323221212123   >>      C11112331312111112111133133313231333132313331333221333131133132312323221212122   >>