B3311331313231311331322331333132313331322331323133313231313331211   >>    B331133131323131133132233133313231333132233132313331323131333121   <<    B3311331313231311331322331333132313331322331323133313231313331213   >>      B3311331313231311331322331333132313331322331323133313231313331212   >>