factory who happened to hear the problem of engineers. He said to them that punch the wing across with little pinholes. Engineers were astonished, but because they had no ideas at all they decided to try and they punched the wing across with little pinholes. And how amazed they were after that, because the wing didn’t break anymore. When they said that to the cleaner and asked how he
had got this idea the cleaner said: “I was working in the toilet paper factory before and I know that toilet paper never cut from the point where little pinholes are!”