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Smartmatch is experimental at ...\noname.pl line 12.
Can't declare scalar dereference in "my" at ...\noname.pl line 6, near
+ "$no1 ="
Execution of ...\noname.pl aborted due to compilation errors.

Possible attempt to separate words with commas at ...\noname.pl line 4
+.
Possible attempt to separate words with commas at ...\noname.pl line 5
+.
...
Global symbol "$worksheet" requires explicit package name (did you for
+get to declare "my $worksheet"?) at ...\noname.pl line 25.
Global symbol "$r4" requires explicit package name (did you forget to 
+declare "my $r4"?) at ...\noname.pl line 25.
Execution of ...\noname.pl aborted due to compilation errors.