Because 'sigma' is not available to the internet, the '$' will be used to represent a syllable: # --> #$ or $#. '#' = a word boundary. All word boundaries are syllable boundaries. By convention, but ...

Humpback whale songs share structural similarities with human language, suggesting complex communication patterns.

A computer that references memory on word boundaries. Word addressing applies to very early computers as the memory (RAM) in computers today addresses a single byte (see byte addressable).