B33113313132313113313223313331311331211113313233211113313232212121   >>    B3311331313231311331322331333131133121111331323321111331323221212   <<    B33113313132313113313223313331311331211113313233211113313232212123   >>      B33113313132313113313223313331311331211113313233211113313232212122   >>