Knight is the most mysterious figure in a chess game. The main distinguishing feature — change the color of the field with each move.
It is required to determine whether a knight standing on a cell with the specified coordinates (row number and column number) can beat a piece standing on another specified cell.
Input
Four numbers are entered: the coordinates of the knight and the coordinates of another figure. Coordinates are integers between
1 and
8.
Imprint
It is required to output the word
YES if the knight can capture the piece in 1 move, otherwise output the word
NO.
Examples
| # |
Input |
Output |
| 1 |
1
1
2
3 |
YES |
| 2 |
3
2
8
3 |
NO |