JZPLIT - Turn on the lights

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Recently Zippy received a puzzle. It is an n*m matrix. In each cell of the matrix, there is a switch and a light. Once he flips the switch in a cell, lights in the same column or the same row as the cell (including itself) change to its opposite state (which means: on->off off->on). Zippy wants to turn on all the lights. Please help him to solve the puzzle.

Input

First line, n, m.

The following n lines, each line is a m-length string, represting the original state. (0 means on and 1 means off)

1<=n,m<=1000

First line, n, m.
The following n lines, each line is a m-length string, represting the original state. (0 means on and 1 means off)
1<=n,m<=100

Output

n lines, each line is a m-length string. It's obvious that if a valid solution exists, there exists a solution that every switch is flipped no more than once. So 1 means the switch is flipped once and 0 means the swtich remains unflipped. 

It's guaranteed that there always exists a solution. If there are multiple solutions, output any of them. 

Example

Input:
2 3
010
010

Output:
010
101


Added by:sevenkplus
Date:2011-09-12
Time limit:0.100s
Source limit:50000B
Memory limit:1536MB
Cluster: Cube (Intel G860)
Languages:All