B3311331313231311331322331333132333133313221133132313231333132313232212312311   >>    B331133131323131133132233133313233313331322113313231323133313231323221231231   <<    B3311331313231311331322331333132333133313221133132313231333132313232212312313   >>      B3311331313231311331322331333132333133313221133132313231333132313232212312312   >>