B3311331313231311331322331333132333133313231332113313331333132322312121   >>    B331133131323131133132233133313233313331323133211331333133313232231212   <<    B3311331313231311331322331333132333133313231332113313331333132322312123   >>      B3311331313231311331322331333132333133313231332113313331333132322312122   >>