echo Test 1.  Should print 3892756435 12
./pbmmake -white 16 2 | cksum
echo Test 2.  Should print 1576602925 8
./pbmmake -black 1 1  | cksum
echo Test 3.  Should print 4272952448 14
./pbmmake -gray 7 7   | cksum
echo Test 4.  Should print 1634688086 15
./pbmmake -grey 8 8   | cksum
echo Tests done.