ns  delta d c a z_o z_s 
          0     +0 U U U   U   U 
          0     +1 0 0 0   0   U 
          5     +0 0 0 0   0   0 
       5000     +0 0 0 1   0   0 
      20000     +0 1 0 1   0   0 
      25000     +0 1 1 1   0   0 
      25009     +0 1 1 1   0   1 
      30000     +0 1 0 1   0   1 
      30000     +1 1 0 1   1   1 
      35000     +0 0 0 1   1   1 
      35000     +1 0 0 1   0   1 
      35005     +0 0 0 1   0   0 
      40000     +0 0 1 0   0   0 
      45000     +0 0 0 1   0   0 
      50000     +0 1 0 1   0   0 
      55000     +0 0 0 1   0   0 
      60000     +0 0 0 0   0   0