Problems
Point on a ray
Point on a ray
Determine whether a given point belongs to the ray.
\InputFile
$6\:$ numbers are given --- the coordinates of the point and the coordinates of the beginning and end of the vector. All input data are integers not exceeding $10000$ by absolute value.
\OutputFile
Print \textbf{YES} if the point belongs to the ray, and \textbf{NO} otherwise.
Input example #1
1 6 3 7 5 8
Output example #1
NO