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

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