Clay tablets written in Ugaritic provide the earliest evidence of both the North Semitic and South Semitic orders of the alphabet, which gave rise to the alphabetic orders of the reduced Phoenician alphabet and its descendants (including Greek and Latin) on the one hand, and of the Ge'ez alphabet on the other. Arabic and Ancient South Arabian script are the only other Semitic alphabets which have letters for all or almost all of the 29 commonly reconstructed proto-Semitic consonant phonemes. (But note that several of these distinctions were only secondarily added to the Arabic alphabet by means of diacritic dots.) According to Manfried Dietrich and Oswald Loretz in "Handbook of Ugaritic Studies" (eds. Wilfred G.E. Watson and Nicholas Wyatt, 1999): "The language they 30 signs represented could be described as an idiom which in terms of content seemed to be comparable to Canaanite texts, but from a phonological perspective, however, was more like Arabic" (82, 89, 614).