Alternatively, the distortion may be based upon {TAIL ~ a set} of {HEAD ~ user preferences}, e.g. keep the noise down, more special effects please, make it jolly Im depressed etc 
Alternatively , the distortion may be based upon { TAIL ~ a set } of { HEAD ~ user preferences } , e.g. keep the noise down , more special effects please , make it jolly I m depressed etc
OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH