B33113313132313113313223313331323133313221211331333133313232213223121   >>    B3311331313231311331322331333132313331322121133133313331323221322312   <<    B33113313132313113313223313331323133313221211331333133313232213223123   >>      B33113313132313113313223313331323133313221211331333133313232213223122   >>