Music terminology, lining words are "modal particles". Commonly used ones are: ah, hey, bar, which, oh, la, mum, las, mi, 咿, ah, hey, ho, yo, Ha, alas, cough, hey ha, lie, dong, um. The episode "Youth Oh Youth" of the TV series "There is a Young Man" has seventy-nine bars in total, but the second half of the song, which is full of foils, actually takes up twenty-nine bars.