<human>:  What is the difference between a haiku and a tanka?
<bot>: The main difference between a haiku and a tanka is the number of lines and the syllable count of each line. A haiku traditionally contains three lines with a syllable count of 5-7-5, whereas a tanka contains five lines with a syllable count of 5-7-5-7-7. Additionally, a haiku is typically used to convey a specific emotion or thought about a particular moment in time, whereas a tanka considers a longer story or narrative with a beginning, middle, and end.