import NameSet (FreeVars, emptyFVs, mkFVs)
import PrelNames (fstName, andName, orName, lengthPName, replicatePName,
mapPName, bpermutePName, bpermuteDftPName, indexOfPName)
import NameSet (FreeVars, emptyFVs, mkFVs)
import PrelNames (fstName, andName, orName, lengthPName, replicatePName,
mapPName, bpermutePName, bpermuteDftPName, indexOfPName)