The allophones are also found as alternating forms in the popular orthography; "sango" is an alternative to "nsango" (information or news); "nyonso", "nyoso", "nionso", "nioso" (every) are all transcriptions of "nyɔ́nsɔ". In 1976, the "Société Zaïroise des Linguistes" (Zairian Linguists Society) adopted a writing system for Lingala, using the open e and the open o to write the vowels and , and sporadic usage of accents to mark tone, though the limitation of input methods prevents Lingala writers from easily using the and and the accents. For example, it is almost impossible to type Lingala according to that convention with a common English or French keyboard. The convention of 1976 reduced the alternative orthography of characters but did not enforce tone marking. The lack of consistent accentuation is lessened by the disambiguation due to context. The popular orthographies seem to be a step ahead of any academic-based orthography. Many Lingala books, papers, even the translation of the Universal Declaration of Human Rights and more recently, Internet forums, newsletters, and major websites, such as Google's Lingala, do not use the Lingala-specific characters ɛ and ɔ. Tone marking is found in most literary works. The Lingala language has 35 letters and digraphs. The digraphs each have a specific order in the alphabet; for example, "mza" will be expected to be ordered before "mba", because the digraph "mb" follows the letter "m". The letters "r" and "h" are rare but present in borrowed words. The accents indicate the tones as follows:  The Lord's Prayer (Catholic version)  The Lord's Prayer (Protestant version used in Ubangi-Mongala region)  The Mandombe script is an abugida, primarily used to write Kikongo, that can also be used for Lingala. The script is used in the church of Kimbangu as a liturgical script.