樹根

树 = 对 + 木 : Sheldon Shrimp cultivates a Christmas tree in the space station's bathroom. He is very happy that he found the right tree, just the one he imagined, and—in his mind—marks of the tree he imagined with a big green check mark.

根 = 木 + 艮 : Guy Fawkes hates Christmas, so he his especially annoyed when he sees a Christmas tree even in front of the encampment. He takes out his chewing gum, sticks it to the tree's star and pulls it as long as he can to see if he can beat his record. Afterwards he wants to wrap the Christmas tree with the chewing gum.