there is no need to get katakana alphabet set
if u do the others proply the katakana one should be ok
check the rest code if theres some mistake

ahh thx dude ,this shit had drive me .I was so stupid and thought there were only 26 chars in the abc, so I just typed number 26 in my code ,after seeing ur solution I changed my 26 to abc.longth and it passed .:)

all tests passed except this thit
Password of 'カタカナ'
expected 'タコタナ' to equal 'タモタワ'
what the heck is the shit .
I tried just return the str
it shows Password of 'カタカナ'
expected 'カタカナ' to equal 'タモタワ'
is that means PW is カタカナ and is should decode or encode カタカナ to タモタワ?
and btw should I do it in the katakana to tamotawa way i mean k convert to t something like that or do it in the Japanese char list way ?
coz theres no way Japanese used the abc just like English right?
im just simply adding the index of PW str am I doing it wrong ? since others all passed I just cant figure it out