Vowels & consonants are used as alphabet and also as diacritical marks. It includes letters, ligatures, combining diacritical marks ("Niqqud" and cantillation marks) and punctuation. The vowels are written with diacritical signs called "fili". In other alphabetic systems, diacritical marks may perform other functions. Unicode also allows diacritical marks to be represented as separate combining diacritical marks. Generally, other diacritical marks occur only in loanwords. Combining diacritical marks are also present in many other blocks of Unicode characters. With Unicode, it is also possible to combine diacritical marks with most characters. Before the spelling reform of 1904, there were several additional letters with diacritical marks. To preserve the language, linguists must use diacritical marks. In these inscriptions, many letters are already provided with diacritical points. The former is unstressed, and the latter is stressed without any diacritical mark. This allows one to hold a modifier key to type letters with diacritical marks. It makes use of combining diacritical marks. The Enochian script is written from right to left, and may include diacritical marks.