C:\>perl -MO=Deparse -MCPAN -e 'shell'
use CPAN;
'???';
-e syntax OK

C:\>perl -MO=Deparse -MCPAN -e shell
use CPAN;
shell();
-e syntax OK

C:\>perl -MO=Deparse -MCPAN -e "shell"
use CPAN;
shell();
-e syntax OK

C:\>