gmvinput ascii
nodev 10
 1  1 0
-1  1 0
-1 -1 0
 1 -1 0
 0  0 1
11  1 0
 9  1 0
 9 -1 0
11 -1 0
10  0 1

cells 2
ppyrmd5 5
1 2 3 4 5
pyramid 5
10 6 7 8 9
endgmv
