{HEAD ~ The yarn} passes through {TAIL ~ respective eyes} 15, 16, 17 and 18 carried in an upright yarn guide 19 
passes through
{ HEAD ~ The yarn } passes through { TAIL ~ respective eyes } 15 , 16 , 17 and 18 carried in an upright yarn guide 19
HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH