The conversation between human and AI assistant.
[|Human|] In the provided text multiple examples of a metric are given. Extract the third example of a metric.
[|AI|] The third metric or distance function that was encountered in this example is the Hamming distance. The Hamming distance measures the number of character changes that are needed to transform a given string to another.
[|Human|] 
In the provided text multiple examples of a metric are given. Extract the third example of a metric.