Problem A. Axis of choice

Author:A. Klenin   Time limit:1 sec
Input file:input.txt   Memory limit:256 Mb
Output file:output.txt  

Statement

A rectangular area with sides parallel to coordinate axises is represented by coordinates of two opposite corners (x1, y1) and (x2, y2).

Your program must find the coordinate axis which is closest to the given rectangular area.

Input file format

Input file contains four integers x1 y1 x2 y2 — coordinates of area corners.

Output file format

Output file must contain a single string:

Constraints

 − 109 ≤ x1, y1, x2, y2 ≤ 109

Sample tests

No. Input file (input.txt) Output file (output.txt)
1
30 40 10 20
Y
2
-5 20 -4 -20
X
3
1 1 1 1
XY

0.155s 0.017s 13