C1111233131211111211113313331333133313331312331333133112323131212111113223321   >>    C111123313121111121111331333133313331333131233133313311232313121211111322332   <<    C1111233131211111211113313331333133313331312331333133112323131212111113223323   >>      C1111233131211111211113313331333133313331312331333133112323131212111113223322   >>