[献花][花圈]

1 0 1 0
0 0 0 0
1 1 1 1
0 1 0 1

## 样例输入

4
1 0 1 0
0 0 0 0
1 1 1 1
0 1 0 1
4
1 0 1 0
0 0 1 0
1 1 1 1
0 1 0 1
4
1 0 1 0
0 1 1 0
1 1 1 1
0 1 0 1
0

## 样例输出

OK
Change bit (2,3)
Corrupt

[献花][花圈]