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c:\@Work\Perl\monks>perl -le
"use strict;
...
'abc' 1
'123' 1
123 1

c:\@Work\Perl\monks>perl -le
"use strict;
...
123 1
undef 0
() 0

c:\@Work\Perl\monks>perl -le
"use warnings;
...
1..32
ok 33 - no warnings
1..33