representatives.txt
representatives of 4-contact polynomial equivalencesclasses
3    1 0  2 0 1   1 1  3 0 1 2   3 2 3 4  1 3
stands for
(0-0,1)(1-0,1,2)(2,3,4-3)

factors.txt
factorization of representatives

-99 n indicates an irreducible class with n non-canonical symmetries
For example
1  -99 2    3    1 0  2 0 1   1 0  3 2 3 4   2 0 1  2 5 6   3    1 1  2 0 1   1 1  3 2 3 4   2 0 1  2 5 6
indicates that
(0-01)(0-234)(01-56) and (1-01)(1-234)(01-56)
generate the same polynomial.

-999 n indicates a set of n alternative representations of a factor
For example line 19532 in key-class3.txt and key-classes3.txt indicates that
(0-012)(0-034)(01-12)(01-56) factors into
(01-012) and one of the following equivalent factors
(0-12)(0-034)(01-56) or (1-12)(1-034)(01-56)