a planetary gear that meshes with {TAIL ~ each} of the sun gear and {HEAD ~ the ring gear}, and 
a planetary gear that meshes with { TAIL ~ each } of the sun gear and { HEAD ~ the ring gear } , and
OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH