B3311331313231311331322331333132313231323331333131333133313232223213232321   >>    B331133131323131133132233133313231323132333133313133313331323222321323232   <<    B3311331313231311331322331333132313231323331333131333133313232223213232323   >>      B3311331313231311331322331333132313231323331333131333133313232223213232322   >>