4 3 
240  80
0  0     1  -1    
0  1     2  -1   
0  2     3  6    
0  3     7  -1   

1  0     0  5    
1  1     1  2    
1  2     9  10   
1  3     6  11   

2  0     4  -1   
2  1     5  8  
2  2     9  -1  
2  3     10  -1