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Hometwoli varies from other Yokutsan languages in its word for "six," which derives from the same word stem in all other dialects. The Hometwoli word for "six" shows similarities with the word for "nine" in other Yokutsan dialects and may suggest the presence of a base six system.
References
Golla, Victor (2011). California Indian languages. Berkeley: University of California Press. ISBN978-0-520-26667-4.