endogs/images.tar.bz2
endogs/data.tar.bz2
endogs/links.tar.bz2
endogs/other.tar.bz2

dedogs/images.tar.bz2
dedogs/data.tar.bz2
dedogs/links.tar.bz2
dedogs/other.tar.bz2

[...]

encats/images.tar.bz2
encats/data.tar.bz2
encats/links.tar.bz2
encats/other.tar.bz2

decats/images.tar.bz2
decats/data.tar.bz2
decats/links.tar.bz2
decats/other.tar.bz2