We therefore trained the classifiers to consider as targets, during training and testing, only letters that occurred in the observed word, plus w, i, n, and l (depending on the radical), rather than any of the alphabet letters.
the irregular roots n.p.l, i.c.g, q.w.m, and g.n.n in this pattern yield the seemingly similar forms hplh, hcgh, hqmh, and hgnh, respectively.