Curiously, a stereotypical infant directed speech instance that seems distinctly "oral" [0] is the union of those three options: "coo-chee, goo-chee, [k|g]oo".

Curiously, a stereotypical infant directed speech instance that seems distinctly "oral" [0] is the union of those three options: "coo-chee, goo-chee, [k|g]oo". [0] Perhaps only idiosyncratically.