The problem is verified for all numbers below formula_2 by computer.
ð ə WORD_BOUNDARY p ɹ ɑ b l ə m WORD_BOUNDARY ɪ z WORD_BOUNDARY v ɛ ɹ ɪ f aɪ d WORD_BOUNDARY f ɔ ɹ WORD_BOUNDARY ɔ l WORD_BOUNDARY n ʌ m b ə ɹ z WORD_BOUNDARY b ɪ l oʊ WORD_BOUNDARY f ɔ ɹ m j ʊ l ə WORD_BOUNDARY t uː WORD_BOUNDARY b aɪ WORD_BOUNDARY k ə m p j uː t ə ɹ WORD_BOUNDARY