where 0<x<1, 0.6≦y≦1.1 and 0.05≦d≦0.05, {TAIL ~ x} representing {HEAD ~ a weight fraction} 
where 0 < x<1 , 0.6≦y≦1.1 and 0.05≦d≦0.05 , { TAIL ~ x } representing { HEAD ~ a weight fraction }
OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD