Why my code dont print Valid

Question

import re
#your code goes here

c="^(1,8,9)?\d{7}

Answer 1

You are comparing string c on pattern a but you have pattern in 'c', string in 'a'
Should be like re.match(c, a)
But you're pattern search the string starts with 1,8,9 (camma is also a character, not a delimiter, use | instead ) and ends with more 7 digits. Your string has only single character 'c' so it's output invalid anyways.. take input into variable a.

Hope it helps...