For this reason, today there are native Armenian words beginning with the letter օ ("ō") although this letter was taken from the Greek alphabet to write foreign words beginning with "o" . The number and order of the letters have changed over time. In the Middle Ages, two new letters (օ , ֆ ) were introduced in order to better represent foreign sounds; this increased the number of letters from 36 to 38. From 1922 to 1924, Soviet Armenia adopted a reformed spelling of the Armenian language. The reform changed the digraph ու and the ligature և into two new letters, but it generally did not change the pronunciation of individual letters. Those outside of the Soviet sphere (including all Western Armenians as well as Eastern Armenians in Iran) have rejected the reformed spellings, and continue to use the traditional Armenian orthography. They criticize some aspects of the reforms (see the footnotes of the chart) and allege political motives behind them. For about 250 years, from the early 18th century until around 1950, more than 2,000 books in the Turkish language were printed using the Armenian alphabet. Not only did Armenians read this Turkish in Armenian script, so did the non-Armenian (including the Ottoman Turkish) elite. An American correspondent in Marash in 1864 calls the alphabet "Armeno-Turkish", describing it as consisting of 31 Armenian letters and "infinitely superior" to the Arabic or Greek alphabets for rendering Turkish. This Armenian script was used alongside the Arabic script on official documents of the Ottoman Empire written in Ottoman Turkish. For instance, the first novel to be written in Turkish in the Ottoman Empire was Vartan Pasha's 1851 "Akabi Hikayesi", written in the Armenian script. When the Armenian Duzian family managed the Ottoman mint during the reign of Abdülmecid I, they kept records in Armenian script but in the Turkish language. From the middle of the 19th century, the Armenian alphabet was also used for books written in the Kurdish language in the Ottoman Empire. The Armenian script was also used by Turkish-speaking assimilated Armenians between the 1840s and 1890s. Constantinople was the main center of Armenian-scripted Turkish press. This portion of the Armenian press declined in the early twentieth century but continued until the Armenian Genocide of 1915. In areas inhabited by both Armenians and Assyrians, Syriac texts were occasionally written in the Armenian script, although the opposite phenomenon, Armenian texts written in Serto, the Western Syriac script, is more common.