Another space, then the home row (A–L). The pattern holds: AA, SS, DD, FF, GG, HH, JJ, KK, LL. Notably, they , implying they limit themselves to letter keys only.
Based on the string provided, which clearly mimics the layout of a standard QWERTY keyboard (reading the bottom, top, and middle rows of letter keys), here is the development of the concept into a formal white paper. zzxxccvvbbnnmm qqwweerrttyyuuiioopp aassddffgghhjjkkll upd