人 (Person) vs 入 (Enter) vs 八 (Eight)
Two simple strokes leaning in different directions — beginners mix up 人 and 入 even at JLPT N4.
5-Second Radical Distinction Rule: 人 (two legs standing together = Person) • 入 (top leans left as if ducking inside = Enter) • 八 (two strokes separated with space between = Eight).