#
# ex_07.txt
# from I.A.3.b in http://fc.antioch.edu/~james_green-armytage/vm/survey.htm
#
(6)  A B C D
(6)  D C A B
(6)  B C A D
(5)  D A B C
(4)  C A B D
(4)  D B C A
(2)  B C D A
(2)  A C B D
(1)  A C D B