C11112331312111112111133133313331333132313233313231311331123313221231   >>    C1111233131211111211113313331333133313231323331323131133112331322123   <<    C11112331312111112111133133313331333132313233313231311331123313221233   >>      C11112331312111112111133133313331333132313233313231311331123313221232   >>