{TAIL ~ One way valves} in {HEAD ~ the bottom} of the dipper allow water to pass into the dipper 
{ TAIL ~ One way valves } in { HEAD ~ the bottom } of the dipper allow water to pass into the dipper
TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH