sed 's/`/`%60`/g;s/[\]/`%5C`/g;s/%[0-9A-F]\{2\}/`&`/g' | tr '`' '\n' | sed '/^%[0-9A-F]\{2\}$/!s/%/`%25`/' | tr '`' '\n' | awk '$0!~/%/{printf("%s",$0)}/%/{sub("%","0x");printf("\\%04o",$0)}' | xargs -0 printf '%b'