谁是凶手

  数字对应了英文字母，下面是所有的对应情况，粗体是最初被选中的：

42:

db

231:

wa bca

125:

abe le ay

518:

eah er

1911:

aiaa sk aik saa

112123:

aababc kuw kblc alaw

25:

be y

9:

i

912:

iab il

25:

be y

i was killed by a lawyer

凶手是律师。