#227. King move
Print `Yes` if a chess king can go from (x1, y1) to (x2, y2) in one move, otherwise `No` (the squares are different).
### Input
One line: x1 y1 x2 y2 (1-8).
### Output
`Yes` or `No`.
Examples
Input
1 1 2 1
Output
Yes
Input
4 4 4 6
Output
No
💡 You can solve it with Python, JavaScript or blocks. Read the input line by line with input(). Don't print a question (like input("Number: ")). Print exactly what the output asks for, nothing more.