Assignment: In a closed network, messages are transmitted through the network as single, continuous strings. Each message is meticulously crafted, beginning with a keyword that categorizes the message's content. As a new developer in the CyberSec department, your task is to enhance the message filtering system by extracting these keywords for faster message categorization and response.

Write code where you assume message is a String variable that has been assigned a string. This string consists of words separated by single space characters, with a period at the end.

For example: "Alert: Intrusion detected."

Also, assume that another String variable named keyword has been declared.

Write code that assigns the first word of the value of message to keyword

For example, if the value of message was "Alert System reboot required.", your code would assign "Alert" to keyword.