0 4 1 0 0 0 0 
0 0 1 3 0 0 0 
0 0 0 3 4 2 0 
0 0 0 0 4 0 0 
0 0 0 0 0 2 0 
0 0 0 0 0 0 0 
0 0 0 0 0 0 0 
3