p02473 Difference of Big Integers
Difference of Big Integers

Given two integers $A$ and $B$, compute the difference, $A - B$.

Input

Two integers $A$ and $B$ separated by a space character are given in a line.

Output

Print the difference in a line.

Constraints

* $-1 \times 10^{100000} \leq A, B \leq 10^{100000}$



Sample Input 1


5 8


Sample Output 1


-3


Sample Input 2


100 25


Sample Output 2


75


Sample Input 3


-1 -1


Sample Output 3


0


Sample Input 4


12 -3


Sample Output 4


15






Example

Input

5 8


Output

-3
```python
A, B = map(int, input().split())
print(A - B)

```