It is unclear what the word "RJAHS" refers to, so it is difficult to provide an accurate IPA phonetic transcription. However, assuming it is a random combination of letters, one possible transcription could be /ɹəˈdʒæhz/ (ruh-jahz). This represents the pronunciation of the letters "r," "j," "a," "h," and "s" in American English. Keep in mind that without context or knowledge of the intended pronunciation, this transcription may not be accurate.