In Classical Sanskrit, all of them become (ḥ) when the word is at the end of a sentence, and, if the word is followed by another in a sentence, the rules of sandhi for final "-ḥ" are applied. A-stems () comprise the largest class of nouns. As a rule, nouns belonging to this class, with the uninflected stem ending in short-a (), are either masculine or neuter. Nouns ending in long-A () are almost always feminine. A-stem adjectives take the masculine and neuter in short-a (), and feminine in long-A () in their stems. This class is so big because it also comprises the Proto-Indo-European o-stems.  ṛ-stems are predominantly agental derivatives like "dātṛ" 'giver', though also include kinship terms like "pitṛ" 'father', "mātṛ" 'mother', and "svásṛ" 'sister'. The numbers from one to ten are:  All numbers in Sanskrit can be declined in all the cases. Numbers above four are only declined in the plural. ' is declined like a pronominal adjective, though the dual form does not occur. ' appears only in the dual. ' and ' are declined irregularly:  Sanskrit pronouns are declined for case, number, and gender. Many pronouns have alternative enclitic forms. The first and second person pronouns are declined for the most part alike, having by analogy assimilated themselves with one another. Ablatives in singular and plural may be extended by the syllable -"tas"; thus "mat" or "mattas", "asmat" or "asmattas". Sanskrit does not have true third person pronouns, but its demonstratives fulfil this function instead by standing independently without a modified substantive. There are four different demonstratives in Sanskrit: "tat", "etat", "idam", and "adas". "etat" indicates greater proximity than "tat". While "idam" is similar to "etat", "adas" refers to objects that are more remote than "tat". "eta", is declined almost identically to "ta". Its paradigm is obtained by prefixing "e-" to all the forms of "ta". As a result of "sandhi", the masculine and feminine singular forms transform into ' and '. The enclitic pronoun "ena" is found only in a few oblique cases and numbers.