A common mistake...

When in the recent post few minutes ago, the video is about occupations, to be more specific jobs, and sometimes people make mistakes about the usage of articles A and AN. Example: An Universitarian (incorrect), because, even before vowel sound using AN however the same goes to Universe, Union, in this case use A, example: A Universe, A union (sound of Y). On the contrary An Umbrella (vowel sound). Keep studying, keep praticing, the more you do that, your English is getting improve day after day, good luck.