B3311331313231311331322331333132313331323133313233313132322112121   >>    B331133131323131133132233133313231333132313331323331313232211212   <<    B3311331313231311331322331333132313331323133313233313132322112123   >>      B3311331313231311331322331333132313331323133313233313132322112122   >>