most people use top, center, bottom, then ..right top, left top, center right, left center, low left, low right, .. if you play left twist with any of these you increase your english to double and or even triple using right twist also.. this means that the usual 9 english`s you grew to know arent that much knowledge when there`s 18 unknown english`s you havent even used yet.
3 top + 3 middle + 3 bottom= 9 english
3x3 top + 3x3 middle + 3x3 bottom = 27 english`s