source: [lemma=easy] [□] □
destination: [lemma=easy] [□=□] □
spec: It 's easy to understand why the transition can be so difficult . Employee compensation must be made equitable , and productivity and exceptional performance must be rewarded . The third solution would entail a painful , decades-long battle of counter-insurgency against the Chechen rebels . We do all of the machine work and most of the difficult joinery . Without the warming effect of the Gulf Stream , it is easy to understand why Europe would quickly get cold like North America . And it 's easy to understand why they believe in themselves and in their homelands . At-risk kids are children who shoulder so many problems , it 's easy to understand why so many want to escape . With its cross-platform files and formatting preservation , it 's easy to understand why PDF is so popular . If this article is any indication , it looks like the strategy is working . The particle cloud expands to over 30 million miles by the time it reaches Earth .