 Two different styles are observed over the course of the 19th century, with the later style representing a simplified version of the original style.Some consonants begin to represent their aspirated and implosive forms.The script also functions more as an abjad than as an abugida, as vowels are not marked unless the word is monosyllabic and as there are no dependent vowel signs, only independent ones that can appear at the beginning of a word, as with other Indic scripts.