Cuneiform to left-to-right in horizontal rows (rotating all of the pictographs 90° counter-clockwise in the process) and a new wedge-tipped stylus was introduced which was pushed into the clay, producing wedge-shaped ("cuneiform") signs; these two developments made writing quicker and easier. By adjusting the relative position of the tablet to the stylus, the writer could use a single tool to make a variety of impressions. Cuneiform tablets could be fired in kilns to bake them hard, and so provide a permanent record, or they could be left moist and recycled, if permanence was not needed. Many of the clay tablets found
U (cuneiform) Both Ù (cuneiform) and ú are in the top 25 most used signs, but E (cuneiform) and "u (cuneiform)" are not; other vowels (or combination) in the 25 are: a (cuneiform), i (cuneiform), and ia (cuneiform), (which has a secondary use as suffix, ""-mine"", or ""my"", thus in top 25 most used signs). Suffix ""iYa"" is used in the Middle East\Southwest Asia at present day to end placenames, or other names: "My Xxxxx". The use of "u" for numeral 10 has been explained above. It is used in the letters from Tushratta, speaking of the ancestral relations with former father