B3311331313231311331322331333132313331323133313233313232233112321   >>    B331133131323131133132233133313231333132313331323331323223311232   <<    B3311331313231311331322331333132313331323133313233313232233112323   >>      B3311331313231311331322331333132313331323133313233313232233112322   >>