B3311331313231311331322331333131133132333132333133313223313231311331323212221   >>    B331133131323131133132233133313113313233313233313331322331323131133132321222   <<    B3311331313231311331322331333131133132333132333133313223313231311331323212223   >>      B3311331313231311331322331333131133132333132333133313223313231311331323212222   >>