problem #246 - 준혁이의생애마지막정다윤코스프레

준혁이의생애마지막정다윤코스프레

Time Limit: 1 SecMemory Limit: 256 MiB

Example Input 1

5
dayun

Example Output 1

YES

Example Input 2

10
jungdayoon

Example Output 2

NO

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