#readMat["(i,j->2i,2j)"]
#readMat["(i,j->3i+1,3j+1)"]
M 2
3 3
2 0 0 
0 2 0
0 0 1
3 3
3 0 1
0 3 1
0 0 1
#readDom["{i,j| 1<= i,j<=10}"]
D 1
 4 4
	  1 1 0 -1
          1 0 1 -1
          1 -1 0 10
          1 0 -1 10
F 23

