use strict;
use warnings;

sub func {
    my $calls   = shift;
    my $strange = "Call $calls";
    print "In func (start): $strange\n";

    sub subfunc1 {
        print "In subfunc1: $strange\n";
        $strange .= " even";
    }
    
    sub subfunc2 {
        print "In subfunc2: $strange\n";
    }       

    subfunc1();
    subfunc2();

    print "In func (end): $strange\n";
}

func(1);
func(2);
func(3);
func(4);