A directory contains many a numbered sub－dir, and other files or directories as well. E-学而优知识库

A directory contains many a numbered sub－dir, and other files or directories as well. E

A directory contains many a numbered sub-dir, and other files or directories as well. Each numbered
sub-dir contains pictures(only jpg or png) and other files. Some of the pictures are original, while the
others are the result of conversion from the original(jpg.jpg or png.png or jpg.png). Write a BASH
command/script. to list all those orphaned pictures whose original counterparts are missing.

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