B3311331313231311331322331333131133133313231112312111133132211111   >>    B331133131323131133132233133313113313331323111231211113313221111   <<    B3311331313231311331322331333131133133313231112312111133132211113   >>      B3311331313231311331322331333131133133313231112312111133132211112   >>