auto update README.md

README.md

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 |12906. 같은 숫자는 싫어|[링크](./%ED%94%84%EB%A1%9C%EA%B7%B8%EB%9E%98%EB%A8%B8%EC%8A%A4/1/12906.%E2%80%85%EA%B0%99%EC%9D%80%E2%80%85%EC%88%AB%EC%9E%90%EB%8A%94%E2%80%85%EC%8B%AB%EC%96%B4/%EA%B0%99%EC%9D%80%E2%80%85%EC%88%AB%EC%9E%90%EB%8A%94%E2%80%85%EC%8B%AB%EC%96%B4.py)|
 |12910. 나누어 떨어지는 숫자 배열|[링크](./%ED%94%84%EB%A1%9C%EA%B7%B8%EB%9E%98%EB%A8%B8%EC%8A%A4/1/12910.%E2%80%85%EB%82%98%EB%88%84%EC%96%B4%E2%80%85%EB%96%A8%EC%96%B4%EC%A7%80%EB%8A%94%E2%80%85%EC%88%AB%EC%9E%90%E2%80%85%EB%B0%B0%EC%97%B4/%EB%82%98%EB%88%84%EC%96%B4%E2%80%85%EB%96%A8%EC%96%B4%EC%A7%80%EB%8A%94%E2%80%85%EC%88%AB%EC%9E%90%E2%80%85%EB%B0%B0%EC%97%B4.py)|
 |12912. 두 정수 사이의 합|[링크](./%ED%94%84%EB%A1%9C%EA%B7%B8%EB%9E%98%EB%A8%B8%EC%8A%A4/1/12912.%E2%80%85%EB%91%90%E2%80%85%EC%A0%95%EC%88%98%E2%80%85%EC%82%AC%EC%9D%B4%EC%9D%98%E2%80%85%ED%95%A9/%EB%91%90%E2%80%85%EC%A0%95%EC%88%98%E2%80%85%EC%82%AC%EC%9D%B4%EC%9D%98%E2%80%85%ED%95%A9.py)|
+|12915. 문자열 내 마음대로 정렬하기|[링크](./%ED%94%84%EB%A1%9C%EA%B7%B8%EB%9E%98%EB%A8%B8%EC%8A%A4/1/12915.%E2%80%85%EB%AC%B8%EC%9E%90%EC%97%B4%E2%80%85%EB%82%B4%E2%80%85%EB%A7%88%EC%9D%8C%EB%8C%80%EB%A1%9C%E2%80%85%EC%A0%95%EB%A0%AC%ED%95%98%EA%B8%B0/README.md)|
 |12916. 문자열 내 p와 y의 개수|[링크](./%ED%94%84%EB%A1%9C%EA%B7%B8%EB%9E%98%EB%A8%B8%EC%8A%A4/1/12916.%E2%80%85%EB%AC%B8%EC%9E%90%EC%97%B4%E2%80%85%EB%82%B4%E2%80%85p%EC%99%80%E2%80%85y%EC%9D%98%E2%80%85%EA%B0%9C%EC%88%98/README.md)|
 |12917. 문자열 내림차순으로 배치하기|[링크](./%ED%94%84%EB%A1%9C%EA%B7%B8%EB%9E%98%EB%A8%B8%EC%8A%A4/1/12917.%E2%80%85%EB%AC%B8%EC%9E%90%EC%97%B4%E2%80%85%EB%82%B4%EB%A6%BC%EC%B0%A8%EC%88%9C%EC%9C%BC%EB%A1%9C%E2%80%85%EB%B0%B0%EC%B9%98%ED%95%98%EA%B8%B0/README.md)|
 |12918. 문자열 다루기 기본|[링크](./%ED%94%84%EB%A1%9C%EA%B7%B8%EB%9E%98%EB%A8%B8%EC%8A%A4/1/12918.%E2%80%85%EB%AC%B8%EC%9E%90%EC%97%B4%E2%80%85%EB%8B%A4%EB%A3%A8%EA%B8%B0%E2%80%85%EA%B8%B0%EB%B3%B8/%EB%AC%B8%EC%9E%90%EC%97%B4%E2%80%85%EB%8B%A4%EB%A3%A8%EA%B8%B0%E2%80%85%EA%B8%B0%EB%B3%B8.py)|