2eb2de27ebc22bf723ed86e74581776fb5ca55c2004752945f336b536a3d900de7deb594410818d76311e500

7fed8272b58b6af051ee81e04f80757375e7c6a04d474abd0c4768ec6a983e6c

7fed8272b58b6af051ee81e04f8271734a20aad7136a201c1f2ee35ae1898679

M질량 변하면 A가 먼저 돌아갈지 B가 먼저 돌아갈지 어케 아는거임