XOR And Multiply

Chef has a favourite positive integer $X$. He wondered if there are two positive integers $a$, $b$ such that: - $1\le a, b \le 8 \cdot 10^{18}$; - The values $a$ $\&$ $b$ and $a \oplus b$ are **positive** and **divisible** by $X$. Note that $\&$ and $\oplus$ denote [bitwise and](https://en.wikipedia.org/wiki/Bitwise_operation#AND) and [bitwise xor](https://en.wikipedia.org/wiki/Bitwise_operation