A worm with two mouths

Long time ago, there was a certain venomous snake that had two mouths. They bit at each other, fighting for food. The struggle ended in death for both. Hanfeizi

两张嘴的虫A worm with two mouths
 
古时候，有一种毒虫，它只有一个身体却有两张嘴。两张嘴为了争夺食物而互咬，结果便把自己咬死了。《 韩非子 》

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