C3123121111113313121111331333133313331333223313331313331323221221   >>    C312312111111331312111133133313331333133322331333131333132322122   <<    C3123121111113313121111331333133313331333223313331313331323221223   >>      C3123121111113313121111331333133313331333223313331313331323221222   >>