In standard Eastern Catalan, rising diphthongs (that is, those starting with or ) are possible only in the following contexts: in word initial position, e.g. iogurt. Both occur between vowels as in feia and veiem. In the sequences or and vowel, e.g. guant, quota, qüestió, pingüí (these exceptional cases even lead some scholarse.g. , to hypothesize the existence of rare labiovelar phonemes and ).
In standard Eastern Catalan rising diphthongs (that is those starting with or ) are possible only in the following contexts in word initial position eg iogurt Both occur between vowels as in feia and veiem In the sequences or and vowel eg guant quota qüestió pingüí (these exceptional cases even lead some scholarseg  to hypothesize the existence of rare labiovelar phonemes and )