B3311331313231311331322331333132313331322121133133313113313232213231323211231   >>    B331133131323131133132233133313231333132212113313331311331323221323132321123   <<    B3311331313231311331322331333132313331322121133133313113313232213231323211233   >>      B3311331313231311331322331333132313331322121133133313113313232213231323211232   >>