You(1) should(2) expect to make(3) errors(4) in(5) getting each step in(5) the right order, and(6) you(1) will(7) have(8) to pause and(6) think(9) back(10) just as you(1) would(2) in(5) trying to think(9) the alphabet (or the nursery rhyme) backward(10), and(6) it is only reasonable that you(1) will(7) make(3) mistakes(4) and(6) have(8) to go back(10) and(6) start over again... .