B3311331313231311331322331333132313233313231333131333132313331323221211121   >>    B331133131323131133132233133313231323331323133313133313231333132322121112   <<    B3311331313231311331322331333132313233313231333131333132313331323221211123   >>      B3311331313231311331322331333132313233313231333131333132313331323221211122   >>