In 1989 some 1,000 monks ("lam", or "gelong", novices) belonged to the Central Monastic Body in Thimphu and Punakha, and some 4,000 monks belonged to district monastic bodies. The hierarchy is headed by the Je Khenpo, who was assisted by five "lopons" or masters, each in charge of religious tradition, liturgy, lexicography, or logic and university. The "lonpon", one of whom, the Dorji Lonpon, normally succeeded the current Je Khenpo, had under them religious administrators and junior monastic officials in charge of art, music, and other areas. Gelugpa monks were celibate, but Nyingmapas consist of not only monks but also householders, allowing them to marry, raise families, and work in secular occupations while performing liturgical functions in temples and homes. In all, there were some 12,000 monks in Bhutan in the late 1980s. There were also active congregations of nuns, but no figures were readily available. Most of Bhutan's Buddhists are adherents of the Drukpa subsect of the Kargyupa (literally, oral transmission) school, one of the four major schools of Tibetan Buddhism.