Oh, I see. Could I then also change the regex to save two more characters?
perl -e'sub c{pop=~/.\s/;(ord$&&7).1e3+$`}print sort{c($b)<=>c$a}`du -
+h`'
74 characters.
And, in fact, since we are only using .1e3 to make sure the sizes sort properly, why not save one more:
perl -e'sub c{pop=~/.\s/;(ord$&&7)**7+$`}print sort{c($b)<=>c$a}`du -h
+`'
73 characters.
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