The values on the khipu are restricted to 0, 1, 2, 4, 5.
In group 1, both values are 0. In group 4, there are only values of 0 and 1.
Groups 2 and 3 share the property that many of the values are 1 and 5 alternately. Specifically:
\[ P_{2,2i} = 5\;for\;\;i\;=\;(1,...,9) \]
\[ P_{3,2i} = 5\;for\;\;i\;=\;(1,...,10) \]
\[ P_{2,2i-1} = 1\;for\;\;i\;=\;(4,..,9) \]
\[ P_{3,2i-1} = 1\;for\;\;i\;=\;(4,...,10) \]