li [Rex May] mi tulis la > Two consecutive vowels are hard to pronounce. In many cases, this is true. In many languages a glottal stop [?] or some other separator is inserted to keep them distinct. Others may turn into diphthongs, then there's the Spanish method of running them together where "Santa Ana" comes out something like [santa:na]. For those that think consonant pairs are hard to pronounce, try looking at Hawaiiian or some other Polynesian languages and see how difficult it can be to pronounce some of the vowel combinations that occur.