B3311331313231311331322331333132313231323331333131211113313232321313221   >>    B331133131323131133132233133313231323132333133313121111331323232131322   <<    B3311331313231311331322331333132313231323331333131211113313232321313223   >>      B3311331313231311331322331333132313231323331333131211113313232321313222   >>