Is the phone number valid?

Phone numbers in the United States typically consist of 11 digits:

• 1-digit country code

• 3-digit area code

• 3-digit central office or exchange code

• 4-digit subscriber number

A valid example can be: +1 (555) 555-1234.

So, the phone number should start with a +1, followed by a space and then 3 digits enclosed in parentheses. The last 7 digits are separated by a hyphen after the 3 digits.

Given a phone number print, The phone is valid if the phone is valid, and Invalid number otherwise.