The spelling of the word "AURASTSCI" can be explained by its phonetic transcription. The first syllable "AU" is pronounced as /ɔ:/, like in the word "caught". The second syllable "RA" is pronounced as /rɑ:/, like in the word "car". The third syllable "STS" is pronounced as /sts/, like in the word "lists". The final syllable "CI" is pronounced as /ʃi:/, like in the word "she". Therefore, "AURASTSCI" is spelled as /ɔ:rɑ:stsʃi:/ in IPA phonetic transcription.