19 



R2-I4-F14 



S 



S 



s 

 s 

 s 



s 



Rl 



Rl 



RIO 



S2 



R3-I3-F6 



Rl 



Rl 



Rl 



Rl 



S 



S 



R2 



R4-I6-F8 



R2 



S2 



Rl 



R3-Il-F7b 



R3-I1-F5 



R4-Il-F7b 



S3 



Rl 



S5 



S 



S 



R1S3 



