Phoenician was written with the Phoenician script, an abjad (consonantary) originating from the Proto-Canaanite alphabet that also became the basis for the Greek alphabet and, via an Etruscan adaptation, the Latin alphabet. The Punic form of the script gradually developed somewhat different and more cursive letter shapes; in the 3rd century BC, it also began to exhibit a tendency to mark the presence of vowels, especially final vowels, with an aleph or sometimes an ayin. Furthermore, around the time of the Second Punic War, an even more cursive form began to develop, which gave rise to a variety referred to as Neo-Punic and existed alongside the more conservative form and became predominant some time after the destruction of Carthage (c. 149 BC). Neo-Punic, in turn, tended to designate vowels with matres lectionis ("consonantal letters") more frequently than the previous systems had and also began to systematically use different letters for different vowels, in the way explained in more detail below. Finally, a number of late inscriptions from what is now Constantine, Algeria dated to the first century BC make use of the Greek alphabet to write Punic, and many inscriptions from Tripolitania, in the third and fourth centuries AD use the Latin alphabet for that purpose.