Start
  p
    Nodes[Nt]
      t_2
        if@(1:1-1:3)='if'
      t_0
        identifier@(1:4-1:7)='iff'
      t_0
        identifier@(1:8-1:11)='iff'
      t_0
        identifier@(1:12-1:13)='i'
      t_0
        identifier@(1:14-1:15)='f'
      t_0
        identifier@(2:1-2:6)='if50i'
      t_2
        if@(3:1-3:3)='if'
      t_1
        comma@(3:3-3:4)=','
      t_0
        identifier@(3:4-3:5)='i'
  Eof@(4:1-4:1)=''