1<a> 2 <b>b content, 3 <d>d in b,</d> 4 </b> 5 <c> 6 <d>d in c,</d> 7 8<g>g content,</g> 9 10 11 </c> 12 <e> </e> 13 <f>f content, 14 <g>g in f, 15 <d>d in f/g, 16 </d> </g> </f> 17</a> 18 19