Start
  s
    Nodes[Np]
      p_0
        pm@(1:1-1:2)='a'
      p_1
        err@(1:3-1:4)='b'
      p_0
        pm@(1:5-1:7)='ab'
      p_0
        pm@(1:8-1:11)='abc'
      p_0
        pm@(1:12-1:16)='abcd'
      p_0
        pm@(1:17-1:21)='abcd'
      p_1
        err@(1:21-1:22)='e'
      p_0
        pm@(1:23-1:24)='a'
      p_0
        pm@(1:24-1:26)='ab'
      p_1
        err@(1:26-1:27)='b'
      p_1
        err@(1:27-1:28)='c'
      p_1
        err@(1:28-1:29)='c'
      p_1
        err@(1:29-1:30)='d'
      p_1
        err@(1:30-1:31)='d'
      p_0
        pm@(2:1-2:2)='x'
      p_0
        pm@(2:3-2:4)='y'
      p_1
        err@(2:5-2:6)='z'
      p_0
        pm@(2:7-2:10)='xyz'
      p_0
        pm@(2:11-2:12)='x'
      p_1
        err@(2:12-2:13)='z'
      p_0
        pm@(2:14-2:16)='xy'
      p_0
        pm@(2:17-2:19)='yz'
      p_0
        pm@(2:20-2:25)='xxyyz'
      p_1
        err@(2:25-2:26)='z'
  Eof@(3:1-3:1)=''