G'day amparida,

Firstly, PerlMonks is not a code-writing service! It is not OK to post a spec and just expect someone here to do your work for you: see Do Your Own Work in "How (Not) To Ask A Question".

The tools you need for this task may depend on context (which you haven't provided). Take a look at index, to locate instances of 47 within your string, and substr to capture the substring you want. Another option would be to use a regular expression to capture the substrings: see "perlretut - Perl regular expressions tutorial".

I note you say "10 characters after 47", but the "Output:" examples have 15 characters in each instance: you'll need to determine which is correct.

If you subsequently run into difficulties, feel free to ask here, but ensure you follow the guidelines in "How do I post a question effectively?".