Write a program that prints a line with the message “Hello world!”.
Input
There is not input: the program does not read anything.
Output
Print exactly the required text in a line.
Observation
This problem is atypical, because we do not need to read any input, and we always print the same. It is very easy!
Input
Input does not matter.
Output
Hello world!
Input
Really: Input does not matter!
Output
Hello world!