https://buuoj.cn/challenges#%E5%81%87%E5%A6%82%E7%BB%99%E6%88%91%E4%B8%89%E5%A4%A9%E5%85%89%E6%98%8E
The braille in the picture directly find the braille comparison table online
Get the result: kmdonowg
input the obtained password into the decompression password, and decompress the wav
audio file
From the characteristics of listening and looking at the waveform, it should be Morse code
-.-. - ..-. .-- .--. . .. ----- ---.. --... ...-- ..--- ..--.. ..--- ...-- -.. --..
Morse code online conversion: http://www.zhongguosou.com/zonghe/moErSiCodeConverter.aspx
CTFWPEI08732?23DZ
flag{
wpei08732?23dz}