7fecf377c4f66a83239d80e3409c7065935967459ec14cf85860d3e11518a3011c0ba8168d344ed4c33dbfc02748fefa82638e96bf

7be5f400c7806f8723e8f3e7359c7018bdeab3a63b0207b35c90e2fe42cf037e9400d878e72db07b35baaec41279a1cb6d1f4d7fce

연구 효과있었다