1
0
form point 1 1 to point 1 3 step is 1
form point 1 3 to point 2 3 step is 2
form point 1 3 to point 4 3 step is 2
form point 1 3 to point 1 1 step is 2
form point 2 3 to point 2 2 step is 3
form point 2 3 to point 2 4 step is 3
form point 4 3 to point 4 2 step is 3
3
form point 4 5 to point 4 3 step is 1
form point 4 5 to point 4 2 step is 1
form point 4 3 to point 2 3 step is 2
form point 4 3 to point 1 3 step is 2
form point 4 3 to point 4 5 step is 2
form point 4 2 to point 2 2 step is 2
3
-1