test 1 failed:
input:
10
DCDW OTR
RBE EVFSK
HC AD
HI RZSSY
MUMU WKY
XGB XA
HIBZGZ XIKYTW
DWRK FXTH
IZYF TPYJRP
OWUVL ETOR

expected:DCDW
BRE
---
HI
MUMU
BGX
HIBZGZ
DWRK
IZYF
---
got:CDDW
BRE
---
HI
MMUU
BGX
BIHZGZ
DKRW
FZYI
---