Similarly, Example 14b is more readily classified as recurring chromatic pentachords
than as five interlaced chains of major sixths.
The pitch materials of paragraph 2 are all pentachords
or tetrachords, and the interval contents of all the pentachords
are identical, as are those of the hexachords.
This is a list of all possible trichords, tetrachords, pentachords
, and hexachords.
As shown in Example 9, both of the Septet's seven-note themes feature prominent [less than]2-1-2[greater than] tetrachords within the circled  pentachords.
As shown in Example 22, Stravinsky's row begins with an ordered pentachord from the Boulez row, including the highly favored F-G[MUSICAL NOTES NOT REPRODUCIBLE IN ASCII]dyad.
2 is a chain because all the successive pairs of trichords and pentachords combine to make up some transposition or inversion of the same eight pitch classes.
This one tells us, for example, that some trichords combine with more than one pentachord and some pentachords with more than one trichord: within the sc 8-20 norm, sc 3-11 combines with four different pentachords and sc 5-21 combines with three different trichords.