In a true syllabary there may be graphic similarity between characters that share a common consonant or vowel sound, but it is not systematic or at all regular. For example, the characters for 'ke', 'ka', and 'ko' in Japanese hiragana have no similarity to indicate their common "k" sound (these being: け, か and こ). Compare this with Devanagari, an abugida, where the characters for 'ke', 'ka' and 'ko' are के, का and को respectively, with क indicating their common "k" sound.