To secure sensitive information, we may need to change information such as phone numbers, social security numbers, or credit card numbers into the letter $\text{'}$x$\text{'}.$ In this program, you will look for stand alone numbers and convert them into x$\text{'}$s$.$ For example, if the user entered the following text:

My phone number is $2348890$ and my pin is $831$allen$321.$

The above would be changed to:

My phone number is xxxxxxx and my username is $831$allen$321.$

Your solution to this program should $1)$ Ask the user for a sentence $2)$ convert the sentence so that stand alone numbers are changed into x$\text{'}$s $3)$ Display the new text. Note that the $321$ on the username was not converted. Allow the user to repeat the program.$$

c$++$