If you're willing to give up the blanks, here's a rarely known feature of Perl's globbing permutation functionality: 
    for(<{ch}{i,}{ts}{a}{k}{u,}{s}{i,}#>) {
        print "$_\n";
    }

[download]
It prints: 
    chitsakusi#
    chitsakus#
    chitsaksi#
    chitsaks#
    chtsakusi#
    chtsakus#
    chtsaksi#
    chtsaks#

[download]

In reply to Re: Combinatorics in Perl by saintmike
in thread Combinatorics in Perl by wouldbewarrior

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