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;'

In reply to Re: checking particular part of string by hippo
in thread checking particular part of string by sumandas

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