Other crossword clues for answer "EIEIO"EIEIOrefrain in 51-Across that accompanies the sounds at 24-, 37- and 47-Acrossapt vowels missing from this phrase: TH_ L_TTL_ K_DS’ S_NGcommon refrain in pre-K circlesmacDonald’s jingle?letters heard after “cow,” “pig” and “horse”follower of pigs or cows