/usr/share/vim-scripts/sokoban-levels/level75.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.
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# # # # #@#
# $ $ # $ # #
##$# $### # $$# #
# # #.### #$ $ #
# #$#....# # ### #
# $ #.....## # #
##$ #.#....#$$ $ #
# ######..## # # #
# $ $ ### #
# # # # #
####################
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