{HEAD ~ The crowns} of the two upper pulleys are offset to {TAIL ~ the right} and the crowns of the two lower pulleys are offset to the left 
are offset to
{ HEAD ~ The crowns } of the two upper pulleys are offset to { TAIL ~ the right } and the crowns of the two lower pulleys are offset to the left
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH