THE PERFECT SOLUTION

Two women in a train were engaged in an argument. At last, one of them called the conductor. "If this window is open," she said, "I will catch cold and probably will die."
"If the window is shut," the other announced, "I shall suffocate."
The two glared at each other. The conductor was at a loss, but he welcomed the words of a man who sat near.These were,"First, open the window; that will kill one. Next, shut it: that will kill the other.Then we can have peace."