ah on retourne sur
ah on tourner sur
co pro:sub v prep
ah on retourne sur .
a WORD_BOUNDARY ɔ̃ WORD_BOUNDARY ʁ ə t u ʁ n WORD_BOUNDARY s y ʁ WORD_BOUNDARY
a h WORD_BOUNDARY o n WORD_BOUNDARY r e t o u r n e WORD_BOUNDARY s u r WORD_BOUNDARY