Jang Deok-su: Tell me what you’re good at.
Han Mi-nyeo: Everything, except the things I can’t do.
From Squid Game: Season 1 Episode 3: ‘The Man with the Umbrella’ (1×03) | Produced by Netflix
Quote repeated in Episode 4
Mi-nyeo says this line again in Episode 4: “I’m good at everything except the things that I can’t do.” when pitching to join Gi-hun’s and Sang-woo’s team before the Tug-of-War game.
Scene from Ep 3: