æz nˈoʊ ˈʌðɚɹ ˌiːjˈuː kˈʌntɹiz jˈuːzd ɡɹˈeɪdz əbˌʌv pˈɜːfɛkt ˌʌndɚstˈændɪŋ ʌvðə kɜːɹˈɪkjʊləm, θˈɜːtiːn wʌz ʌntɹænslˈeɪɾəbəl tʊ ˈʌðɚ ɡɹˈeɪdɪŋ sˈɪstəmz.
As no other EU countries used grades above perfect understanding of the curriculum, 13 was untranslatable to other grading systems.