default: (accent=true) x x ^ x _ x x ~ x x ¯ x x x ˆ x ˇ x x x x ˜ x x ̂ x x ‾ x x x ← x → x ↔ x ↼ x ↽ x ⇀ x ⇁ x ⎴ x ⎵ x ⏜ x ⏝ x ⏞ x ⏟ x ⥎ x ⥐ accent=false: x ' x ^ x _ x ` x ~ x ¨ x ¯ x ´ x ¸ x ˆ x ˇ x ˘ x ˙ x ˚ x ˜ x ˝ x ̂ x ̑ x ‾ x ⃛ x ⃜ x ← x → x ↔ x ↼ x ↽ x ⇀ x ⇁ x ⎴ x ⎵ x ⏜ x ⏝ x ⏞ x ⏟ x ⥎ x ⥐