B33113313132313113313223313331323133313221211331333131133132313233313232212131   >>    B3311331313231311331322331333132313331322121133133313113313231323331323221213   <<    B33113313132313113313223313331323133313221211331333131133132313233313232212133   >>      B33113313132313113313223313331323133313221211331333131133132313233313232212132   >>