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|          ︵                                       ▂◣                ▃ |   
|    │  ╱                                             |   
|   _ \╱ ̄乀   ∕ ∕         \   ︹ ﹨       |   
|  / ╱        \ ╱          ▆▅▂▃▂▁     ╲/    |   
| │/     ▁▂▁  ▁         ▂▃ ▂_       ▇▅▃          |   
|▄▄▆▆▇▆▅▄▄▅▆▇ ▄▆                 ▇▅         |   
|▄▂▁                ◢ ▅       ▁▂▃▂                     |   
|ㄟ\    ▅▂         ▊◢◤  ▂▃▄▇                 ▎▏/  |   
| \ ╲\╱    ▇▆▄   ◥◤▆▃      ╲╱   |   
|  \╱ \/        /\▆▅   ﹨ ╲丿 |   
|   /   ╲∕          / │                             ╱ │      ╲∕  \  |   
|  │     \          /  │                         /           \   │ |   
|_ --  _ -- _-/-▁▁▂▂▃▄▅▇▆▄▅▇   /  - /  ▇▆▇▇▂▃▄▇ |   
|▂▃▄▃▄▄▅▆▅ ━_ /▁▂▂▂▁▁__ ▁▂▄▆▅▄▃▃▂▁▂▁   ▄▄▅▄|   
|   ▁  ▁▂▁ ╱    /    ▇▆▇▇▆▅▇▆▆▆ ▇▆▆▇▇     _ -      |   
|    ▇▆▄▆▇▇    ━_─ -_              - _  _  ─     ▁▂▃▂▁▁  |   
|aday@USTC    ▁▂▁▁          ▁▂▁                   ▇▆▅▆▆▄▃▃▅▃|