/usr/share/lyx/examples/iecc05.fen is in lyx-common 2.1.4-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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r1bqkbnr/pp3ppp/2npp3/2p5/4P3/2N3P1/PPPPNPBP/R1BQK2R b KQkq - 0 5