鷸蚌相爭 [ㄩˋ ㄅㄤˋ ㄒㄧㄤ ㄓㄥ; yu4 bang4 xiang1 zheng1] lit. sandpiper and clam war together (and the fisherman catches both, idiom); fig. neighbors who can't agree lose out to a third party ◄ ►