Problem Statement

Hachiji-kun loves a game in which you earn score by destroying UFOs. Today as well, he is determined to aim for as high a score as possible.

However, in that game, the score display goes wrong if you earn too much score. Specifically, when the value of the score is $T(0 \leq T < 2^{32})$, the score is displayed as follows.

• If $T < 2^{31}$, the score display is $T$ as it is.
• If $T \geq 2^{31}$, the score display is $2^{32} - T$ preceded by x.

Now, the score display was $S$. Find the value $T$ of the score at this time.

Constraints

• $S$ is either an integer or an integer value preceded by x.
• $0 \leq T < 2^{32}$
• $T$ is a multiple of $10$.

Input

The input is given from standard input in the following format.

$S$

Output

Output the answer.

Sample

2000000000

2000000000

x678048776

3616918520

x1794967296

2500000000