Join Two Strings

Version: Phuoc Hung OJ Extended

Problem Statement

Given two text strings $a$ and $b$, construct a new string by writing all of $a$, inserting exactly one ordinary space (U+0020), and then writing all of $b$.

Insert the separator even if either string is empty. Do not remove or modify any spaces already present in the input strings.

Input

The first line contains $a$ and the second line contains $b$. Either line may be empty and may contain leading or trailing spaces.

Output

Print the concatenation of $a$, one space, and $b$ on one line.

Subtasks

• Subtask 1 (100 points): $0\le |a|,|b|\le 100$ characters.

Examples

Example 1

Input

Xin
chao

Output

Xin chao

Explanation. Concatenating Xin, one space, and chao gives Xin chao.

Example 2

Input

B

Output

 B

Explanation. Since $a$ is empty, the inserted space remains before B.

Example 3

Input

A

Output

A 

Explanation. Since $b$ is empty, the result has a trailing space after A; it must be preserved.