How do you solve the bone riddle on Mythology Island?

Even though there are 15 bones and you have to remove 6, you can still have TEN - make the bones spell the WordTEN.

The guy says there's more than one way of saying it. The number 10 can be the number of bones (actually 9 left) or the written number T E N. When you remove bones from each of the three sets of bones, it spells a letter. Two bones make the T, four bones make an E, and three bones make the N.