write the following in python 352 Check SSN Write a program

write the following in python 3.5.2

(Check SSN) Write a program that prompts the user to enter a Social Security number in the format ddd-dd-dddd, where d is a digit.

The program displays Valid SSN for a correct Social Security number or Invalid SSN otherwise

ssn=input(\'enter ssn in format ddd-dd-dddd : \');

flag=1

if(len(ssn)==11):

for i in range(0,len(ssn)):

if(i==3||i==6):

if(!ssn[i]==\'-\'):

flag=0

break

else:

if(!ssn[i].isdigit()):

flag=0

break

else:

flag=0

if(flag==0):

print \'invalid\'

else:

print \'valid\'