/usr/share/vim-scripts/sokoban-levels/level54.sok is in vim-scripts 20121007.
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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