creation date: Wed Dec 2 19:28:02 MET 1998

76#1 
A^19=id
B^2=id (A)
C^2=B (A^18 B)
76#2 
A^2=id
B^19=id (A)
C^2=A (A B)
76#3 
A^19=id
B^2=id (A)
C^2=id (A^18 B)
76#4 
A^19=id
B^2=id (A)
C^2=id (A B)

last updated: Wed Dec 2 19:28:18 MET 1998 , Anton Betten