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  1. or download this
     for %hash.kv -> my $key, $val {
        say "$key corresponds to $val";
    }
    
  2. or download this
     use strict;
    use warnings;
     
    ...
    a1
    b2
    EXIT
    
  3. or download this
    while( deal {a=>1,b=>2} my($k,$v) ) {..}