Global symbol "%mapping" requires explicit package name at ./t line 26.
Global symbol "%mapping" requires explicit package name at ./t line 27.
Global symbol "%mapping" requires explicit package name at ./t line 30.
Global symbol "%mapping" requires explicit package name at ./t line 31.
Global symbol "%mapping" requires explicit package name at ./t line 39.
Execution of ./t aborted due to compilation errors.


##</code><code>##

Use of uninitialized value in concatenation (.) or string at ./t.pl line 40, <IHF> line 233.

##</code><code>##

 print "$mapping{$n}\n";