C11112331312111112111133133313331333133313331333133313113313233221231   >>    C1111233131211111211113313331333133313331333133313331311331323322123   <<    C11112331312111112111133133313331333133313331333133313113313233221233   >>      C11112331312111112111133133313331333133313331333133313113313233221232   >>