/usr/share/octave/packages/tisean-0.2.3/ is in octave-tisean 0.2.3-3.
This file is owned by root:root, with mode 0o755.
..
/usr/share/octave/packages/tisean-0.2.3/av_d2.m
/usr/share/octave/packages/tisean-0.2.3/boxcount.m
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