muß der A+A machen
muß der a a machen ?
m uː s WORD_BOUNDARY d ɛ ɐ WORD_BOUNDARY  aː WORD_BOUNDARY  aː WORD_BOUNDARY m a x ə n WORD_BOUNDARY
m u ß WORD_BOUNDARY d e r WORD_BOUNDARY a WORD_BOUNDARY a WORD_BOUNDARY m a c h e n WORD_BOUNDARY