/usr/share/vim-scripts/sokoban-levels/level3.sok is in vim-scripts 20130814ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 | ########
# @#
# $#$ ##
# $ $#
##$ $ #
######### $ # ###
#.... ## $ $ #
##... $ $ #
#.... ##########
########
|