A Latvian went to work one day and observed two Russians one was digging holes . Come lunchtime he is enjoying the sun and a bite and observes the two Russians again, the second was filling-in holes as fast as the first was digging them. He was consumed with intrigue so he asks the second, "Ruskie, why are you filling-in those holes as soon as your mate has finished digging them?"
"Well" says Ivan "you see Dimitri is off sick, and he is the one who plants the trees".