翻訳：Analyze blocks
In any block のh h h 翻訳： consecutive steps, if e e e は+p+p +p steps, its displacement はep−(h−e)q=(e−q)h ep-(h-e)q=(e-q)h ep−(h−e)q=(e−q)h. したがって 各 di d_i di はa multiple のh h h 翻訳：. Also di+1−di d_{i+1}-d_i di+1−di はdifference のtwo steps およびはone の0,h,−h0,h,-h 0,h,−h.