PROGRAMMING:Welcome message
According to the input name, output welcome information.
###Input format:
Enter the name (a string no more than 20 long and containing no spaces).
###Output format:
Output the corresponding welcome message. That is, add "hello" before the name. Please refer to sample for details.
###Input example:
Here is a set of inputs. For example:
```in
acmer
```
###Output example:
The corresponding output is given here. For example:
```out
hello acmer
```
answer：If there is no answer, please comment
###Input format:
Enter the name (a string no more than 20 long and containing no spaces).
###Output format:
Output the corresponding welcome message. That is, add "hello" before the name. Please refer to sample for details.
###Input example:
Here is a set of inputs. For example:
```in
acmer
```
###Output example:
The corresponding output is given here. For example:
```out
hello acmer
```
answer：If there is no answer, please comment