local Sound = {}
function Sound:new(vowel)
	self.vowel = vowel or "a"
    return setmetatable({}, {__index = self})
end
function Sound:new(vowel)
    return setmetatable({}, {__index = self})
end
function Sound:default(stem1, stem2)
	local v = self.vowel
    return {
        "u"..stem1, 
        "tu"..stem1, 
        "tu"..(stem2 or stem1).."ī", 
        "u"..stem1, 
        "nu"..stem1, 
        "tu"..(stem2 or stem1).."ā", 
        "u"..(stem2 or stem1).."ū",
        "u"..(stem2 or stem1).."ā", 
    }
end
function Sound:imp(s)
    return {
        "lu"..s.pret1, 
        s.imp2, 
        s.imp1.."ī",
        "li"..s.pret1,
        "i ni"..s.pret1,
        s.imp1.."ā",
        "li"..s.pret2.."ū",
        "li"..s.pret2.."ā",
        
    }  
end
function Sound:dur(stem1, stem2)
    return self:default(stem1, stem2)
end
    
function Sound:perf(stem1, stem2)
    return self:default(stem1, stem2)
end
    
function Sound:pret(stem1, stem2)
    return self:default(stem1, stem2)
end
function Sound:nominal(stem)
    return stem.."um"
end


return function (roots)

	return Sound:new()
end