Re: checking particular part of string

[hippo]

To make it generic you would need a capture group. eg:

echo sumanna | perl -pe 's/(na$)/uc($1)/e;'

Is this what you were after?

---

Update: for an example with more obvious genericism try:

echo sumanna | perl -pe 's/(..$)/uc($1)/e;'

[moritz]

Or as a simplification, s/(na$)/\U$1/ or just s/na$/NA/