The identity element for this group is zero.
ð ɪ WORD_BOUNDARY aɪ d ɛ n t ɪ t i WORD_BOUNDARY ɛ l ɪ m ə n t WORD_BOUNDARY f ɔ ɹ WORD_BOUNDARY ð ɪ s WORD_BOUNDARY ɡ ɹ uː p WORD_BOUNDARY ɪ z WORD_BOUNDARY z iə ɹ oʊ WORD_BOUNDARY