Input 
3 5
2 2 2 3 2
0 0 0 1 0
1 1 1 2 1
Output 
4
row 1
row 1
col 4
row 3
Input 
3 3
0 0 0
0 1 0
0 0 0
Output 
-1
Input 
3 3
1 1 1
1 1 1
1 1 1
Output 
3
row 1
row 2
row 3