{TAIL ~ A content} of 4.0 percent by {HEAD ~ weight} is already considered sufficient in every case 
{ TAIL ~ A content } of 4.0 percent by { HEAD ~ weight } is already considered sufficient in every case
TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH