B3311331313231311331322331333132313231323331333131211113313331313223232321   >>    B331133131323131133132233133313231323132333133313121111331333131322323232   <<    B3311331313231311331322331333132313231323331333131211113313331313223232323   >>      B3311331313231311331322331333132313231323331333131211113313331313223232322   >>