B3311331313231311331322331333132322331323231333133313331311211313311   >>    B331133131323131133132233133313232233132323133313331333131121131331   <<    B3311331313231311331322331333132322331323231333133313331311211313313   >>      B3311331313231311331322331333132322331323231333133313331311211313312   >>