B3311331313231311331322331333132313331322331323133313331311221123123212321   >>    B331133131323131133132233133313231333132233132313331333131122112312321232   <<    B3311331313231311331322331333132313331322331323133313331311221123123212323   >>      B3311331313231311331322331333132313331322331323133313331311221123123212322   >>