C11112331312111112111133133313331333133313123313331322331323231312321221   >>    C1111233131211111211113313331333133313331312331333132233132323131232122   <<    C11112331312111112111133133313331333133313123313331322331323231312321223   >>      C11112331312111112111133133313331333133313123313331322331323231312321222   >>