B3311331313231311331322331333132313331323331211113313231333131133132213223321   >>    B331133131323131133132233133313231333132333121111331323133313113313221322332   <<    B3311331313231311331322331333132313331323331211113313231333131133132213223323   >>      B3311331313231311331322331333132313331323331211113313231333131133132213223322   >>