{TAIL ~ A suitable phenol formaldehyde} is {HEAD ~ m cresol formaldehyde} and a suitable sensitizer is a naphthoquinone diazide sulfonic acid ester 
{ TAIL ~ A suitable phenol formaldehyde } is { HEAD ~ m cresol formaldehyde } and a suitable sensitizer is a naphthoquinone diazide sulfonic acid ester
TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH