What is the keyword？(敲击码+关键字+音符)

题目：

13155424435324113455153322

♫♩♬♫♫♭♫¶♫♫♫¶♫¶♬♬‖♭♫¶¶♫♬♩♫♬∮♬♪§♫♬¶♬♭‖♬♯♩♬‖∮♬♪♯♫♫♫♫♫‖♬§♭♫♬¶♬♯♩♬♪♯♫♬♬♬♯♩♫♩♬♫¶‖♬♭♪♫¶♯§==

分析13155424435324113455153322，具备敲击码特征
C(K)EYISXIAOZENG
key是xiaozeng
音符转文本

得到efxn{Dzwu0pO_A1lgZp_1q_esJ}
关键字解密

FLAG{KEYW0RD_C1PHER_1S_FUN}
最终的flag是
flag{Keyw0rD_C1phEr_1s_fuN}