{HEAD ~ A macro cell} describes {TAIL ~ an arrangement} of cells that may be incorporated into an integrated circuit design and that may include a set of clocked devices and a clock tree subtree for delivering a clock signal to the sinks 
describes
{ HEAD ~ A macro cell } describes { TAIL ~ an arrangement } of cells that may be incorporated into an integrated circuit design and that may include a set of clocked devices and a clock tree subtree for delivering a clock signal to the sinks
HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH