B33113313132313113313223313331323133313232233121133133313331333131133112112121   >>    B3311331313231311331322331333132313331323223312113313331333133313113311211212   <<    B33113313132313113313223313331323133313232233121133133313331333131133112112123   >>      B33113313132313113313223313331323133313232233121133133313331333131133112112122   >>