7cf3c028e2f206a26d81f6e34f847768

28b9d932da836ff73eee81e54080756e079c8c00289ccd8c4d333973b2024ef4cc5e

빨간게원함수 파란게역함수

28b9d932da836ff73eee81e54388716987a785bf93477db9d9c846c7d1e0d6cfc40f

가까이서보면이럼