Letter case trickery
This file is in a downright esoteric format, consisting of hexadecimal numbers, non-hexadecimal keywords, and "Z" indicating end-of-line. Make the hexadecimal numbers lowercase.
Start file
A4E SUM 3C0Z
2B A9 NE F2Z
End file
a4e SUM 3c0Z
2b a9 NE f2Z
View Diff
1,2c1,2
< A4E SUM 3C0Z
< 2B A9 NE F2Z
---
> a4e SUM 3c0Z
> 2b a9 NE f2Z
Solutions by @LeonardBereska:
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