B3311331313231311331322331333132313233313233213331333132313331311213232211   >>    B331133131323131133132233133313231323331323321333133313231333131121323221   <<    B3311331313231311331322331333132313233313233213331333132313331311213232213   >>      B3311331313231311331322331333132313233313233213331333132313331311213232212   >>