Thanks Smithsax but I can't still account for the missing four cells though I know I must be wrong. The wiki picture clearly shows the asymmetric nature of the second 'word' and the elements that need to be highlighted (sorry, by shaded I meant highlighted not coloured). But the grid is not wide enough to match the wiki representation 'literally'. I can put the extra four cells in but it doesn't then match wiki bitwise'.
This is assuming that the first word is 30 cells and so the second 'word' must be 13 cells i.e. not symmetric.