C1111233131211111211113313331333131133132321233133313331333112123121   >>    C111123313121111121111331333133313113313232123313331333133311212312   <<    C1111233131211111211113313331333131133132321233133313331333112123123   >>      C1111233131211111211113313331333131133132321233133313331333112123122   >>