[ ȩ :     ] 
 
 
 
 G r a v i s   U l t r a S o u n d    lD  iȲ. 
 
 
 
 t r u e   :   G r a v i s   U l t r a   S o u n d   
 
 f a l s e   :   G r a v i s   U l t r a   S o u n d   Hh
 
 
 
 |ǀ    t  0t  8  <t  8   
 
 |ǴŠ    ǵȲ.   tL  f a l s e \  $. 
 
 