tcfail072.hs:23:
    Ambiguous type variable(s)
    `aNk'
	in the constraint `Ord aNk'
	arising from use of `g' at tcfail072.hs:23
 
tcfail072.hs:23:
    Ambiguous type variable(s)
    `aNn'
	in the constraint `Ord aNn'
	arising from use of `g' at tcfail072.hs:23


Compilation had errors