/usr/share/vim-scripts/sokoban-levels/level6.sok is in vim-scripts 20130814.
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 11 | ###### ###
#.. # ##@##
#.. ### #
#.. $$ #
#.. # # $ #
#..### # $ #
#### $ #$ #
# $# $ #
# $ $ #
# ## #
#########
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