B3311331313231311331322331333132313231323211331323133313232213131   >>    B331133131323131133132233133313231323132321133132313331323221313   <<    B3311331313231311331322331333132313231323211331323133313232213133   >>      B3311331313231311331322331333132313231323211331323133313232213132   >>