long_sideways--->Mammalia


dog
etc(5)  
cat
footprint(4) etc(23) 
domestic animal
horse(1) sheep(1)
pig(1)  
small_mammals
rat(1) monkey(1)
koala(1) bat(5)
hamster(1) rabbit(8) 
bigsize_mammals
giraffe(1) elephant(1)
panda(1) bear(5)
bear_doll(1) 熊顔(1) 
sea_mammals
dolphin(4)  
Mammalia
etc(6)