However, you might be thinking about how the short "u" sound is represented in writing. There are several ways to spell it, and they can look different depending on the word:
* "u": like in "cup", "sun", "but"
* "o": like in "love", "shove", "dove"
* "oo": like in "book", "look", "foot"
Keep in mind that these spellings can also represent other sounds, so it's important to pay attention to the context of the word to figure out the intended pronunciation.