Or just use "lo'u" if what we want is just a string of characters without any internal grammar. But li/me'o take a mathematical _expression_, not just any character-string, one returns an _expression_ and the other returns its value. It would be strange for them to have different grammars, because then you couldn't distinguish the value from _expression_ by just choosing "li" or "me'o".
{ienai}.
{me'o dy ubu ry ky abu vo re} -> "durka42"
{lo'u dy ubu ry ky abu vo re le'u} -> "dy ubu ry ky abu vo re"