> obf.pl 13 test.dat > t.1

> cat t.1

# Rotational distance was undefined, assuming 0
13
public        }$oyvp
private       }!v%n#r
our-read      =$_@nq
our-write     =&_>#@
their-read    #u@>!rnq
their-write   #urv!&!|{t
blah-blah     oynu:oyMu
foo-bar       on!s||on!