Hungarian numbers follow an extremely regular, decimal format. There are distinct words for 1 to 9, 10, 20, 30, 100, 1000 and 1000000. The tens from 40 to 90 are formed by adding "-van/-ven" to the digit. When the numbers 10 and 20 are followed by a digit, they are suffixed with "-on/-en/-ön/-n" (on the oblique stem). Compound numbers are formed simply by joining the elements together. Examples:  As in English, a number can function as a determiner or as a stand-alone noun. As a noun it can take all the usual suffixes. Suffixes used only on numerals and "hány" ("how many?"): The numeric adjectives do not have an exact equivalent in English. They are used when English uses a construction such as "bus number 11": "a tizenegyes busz", "room 303": "a háromszázhármas szoba". Suffixes used specifically with numerals, "hány" ("how many?") and other quantity expressions:  The use of the adverbs suffixed with "-an/-en/-n" is best illustrated by examples: "Sokan voltunk." ("There were a lot of us.") "Öten vannak." ("There are 5 of them.") "Ketten mentünk." ("Two of us went.") In Hungarian, pronominal possession is expressed by suffixes applied to the noun. The following suffixes are used for singular nouns:  The following suffixes are used for plural nouns:  The "háza, házai" type (i.e., like the one with a singular possessor) is used in the 3rd person plural except when no pronoun or only the "ő" is present before it, e.g. "a szülők háza" "the parents' house". In other words, the plural "-k" of the 3rd person suffix is left from the noun if there is a lexical possessor preceding it. The definite article is usually used. It can be omitted in a poetic or literary style. It may also be omitted at the beginning of the sentence in colloquial speech. The possessor can be emphasized by adding the subject pronoun, e.g. "az én házam" (""my" house").