7ceb8370b48a6cff3cef85e2449f34335f90c3f098002744bec8ff623b

7ceb8370b48a6cff3fed81e3439f34333715b8813802a895548034e2e0

7ceb8370b48a6cfe36e885ec449f3433f2c892f03c9ea294475d395467

뭐 어떻게 연습해야되는고야?