how to convert xprv to wif or (hex) 1,2,3 address index

i try this script?

https://github.com/lyndsysimon/bip32utils

k.txt :

I want to use this command to select xprv  one by one and convert to wif or privkey(hex)

cat k.txt | bip32gen \ -i xprv -f - \ -o wif -F - \ 0 1



But it only works if there are only 1 xprv in the dictionary  / please help me how to do so that a lot can be converted

maybe some other similar script or this one like that?