I was just looking at these letter combinations used to create accents on letters…
√§ √´ √Ø √∂ √º, option-u is appropriate, because the letter “u” has two prongy thingys that look like two dots.
√¢ √™ √Æ √¥ √ª, option-i is good, because the letter “i” kinda points up to the sky.
√° √© √≠ √≥ √∫, option-e is excellent, because the bottom part of an “e” points up on an angle.