nggak bisa keras+keras
nggak bisa keras keras .
ŋ ɡ a k WORD_BOUNDARY b i s a WORD_BOUNDARY k ɛ r a s WORD_BOUNDARY k ɛ r a s WORD_BOUNDARY
n g g a k WORD_BOUNDARY b i s a WORD_BOUNDARY k e r a s WORD_BOUNDARY k e r a s WORD_BOUNDARY