10 10 doc 0 0
20 1 doc 0 0
31 1 a 0 0
42 3 #text 0 1 This
51 15 a 0 0
61 1 b 0 0
72 3 #text 0 1  is a valid
81 15 b 0 0
91 1 a 0 0
102 3 #text 0 1  document
111 15 a 0 0
120 15 doc 0 0
13