p02817 AtCoder Beginner Contest 149 - Strings
Given are two strings S and T consisting of lowercase English letters. Concatenate T and S in this order, without space in between, and print the resulting string.

Constraints

* S and T are strings consisting of lowercase English letters.
* The lengths of S and T are between 1 and 100 (inclusive).

Input

Input is given from Standard Input in the following format:


S T


Output

Print the resulting string.

Examples

Input

oder atc


Output

atcoder


Input

humu humu


Output

humuhumu
```python
a = input().split()
print(f"{a[1]}{a[0]}")
```