una palla un' altra palla
uno palla uno altro palla
una palla un' altra palla .
ʊ n a WORD_BOUNDARY p a l l a WORD_BOUNDARY ʊ n WORD_BOUNDARY a l t r a WORD_BOUNDARY p a l l a WORD_BOUNDARY
u n a WORD_BOUNDARY p a l l a WORD_BOUNDARY u n ' WORD_BOUNDARY a l t r a WORD_BOUNDARY p a l l a WORD_BOUNDARY