Author:  A. Klenin  
Input file:  input.txt  Time limit:  1 sec  
Output file:  output.txt  Memory limit:  256 Mb 
A rectangular area with sides parallel to coordinate axises is represented by coordinates of two opposite corners (x_{1}, y_{1}) and (x_{2}, y_{2}).
Your program must find the coordinate axis which is closest to the given rectangular area.
Input file contains four integers x_{1} y_{1} x_{2} y_{2} — coordinates of area corners.
Output file must contain a single string:
−10^{9} ≤ x_{1}, y_{1}, x_{2}, y_{2} ≤ 10^{9}
No.  Input file (input.txt ) 
Output file (output.txt ) 

1 


2 


3 

