JAVA please:

Responsibility for evaluating the effectiveness of emails sent to the company recently.

Basically, you need to do a program that reads the contents of an email sent by an employee and displays the number of distinct words in that email.

Input You will read the text of the email from the keyboard. It can span multiple lines and contains only lowercase letters of the English alphabet and spaces.

Output A single integer will be displayed, representing the number of distinct words in the email

Specifications The text does not contain more than 100000 words, and each word can contain up to 25 characters.

Example

thanks for the list of instructions It's helpful thanks

it will display: 8