Edmontosaurus toe bone position need help

[vietnamfossil]

Hello, I have this edmontosaurus from Hellcreck fm. I know it is a toe bone but I cannot spot it is belong the font feet or the back feet, Which position in the feet, is it in the middle of the rear. 
It would be great that if you can help me to spot the position.

 Thank you! 

[Troodon]

Its a foot bone from the left digit IV...probably phalanx 3 but here is a publication that can help you.

Hadro Foot.pdf

[vietnamfossil]

Thank you very much!