What is the poem of eighteen pairs of thirty-six armies?

From the joke: "Stealing food is a wonderful way". "

When the cook cooks, he always steals food. The expert knows that there is no way, because there is no evidence. One day, the host wanted to cook the sauce meat, so he cut the meat himself, counted 36 pieces in detail, and then asked the chef to cook it. I thought it would be foolproof this time; Even if it's short, I have something to say. When it is ready to be served on the table, although the quantity is quite large, the weight seems to have been greatly reduced. When the master looked carefully, there was a dark wound on every piece of meat. It turned out that the chef was wary, afraid that the wrong number would be easily found by the owner, so after the meat was cooked, every piece was cut off. After the host sighed, he recited a poem: 36 troops were sent, 18 pairs were withdrawn, and many soldiers were ordered, all of whom were injured. "