/usr/share/vim-scripts/sokoban-levels/level66.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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