ROT13

{{ $text := lower (reReplace `\d+` (joinStr " " .CmdArgs) "") }} {{ $cipher := "" }}
{{ range seq 0 (len $text) }}
    {{ $ctext := index $text . }}
    {{ if and (le $ctext 109) (not (eq $ctext 32) ) }}
        {{ $ctext = add $ctext 13 }}
    {{ else if eq $ctext 32 }}
        {{ $ctext = 32 }}
    {{ else }}
        {{ $ctext = sub $ctext 13 }}
    {{ end }}
{{ $cipher = joinStr "" $cipher (printf "%c" $ctext) }}
{{ end }}
{{ $cipher }}