Mo Nighean Donn

"s u _ _ e s s _ u_ / _ e _ _ _ _ / _ a _ e/ a / s _ _ i a _/ _ e s _ _ _ _ s i _ _ _ y/ _ _ / _ a _ _/ _ _ e / _ _ r _ _ / a / _ e _ _ e r / _ _ a _ e / a _ _ / _ _ _ / _u _ _ / _ a _ e / _ _ _ m / i _ ."


Guessed: E, I , A , R, S, M , Y , U