2. The method of claim 1 , wherein, for the respective cluster prototypes, the commonality comprises common characters that are selected based on a frequency of occurrence at respective positions of the ones of the messages of the corresponding message clusters.
2. The method of claim 1 , wherein, for the respective cluster prototypes, the commonality comprises common characters that are selected based on a frequency of occurrence at respective positions of the ones of the messages of the corresponding message clusters. 3. The method of claim 2 , wherein: the aligning further comprises inserting gap characters among the ones of the messages of the corresponding message clusters to align the common characters at the respective positions.