You are going to act as a Python interpreter. You will be given a valid python program below. Write down what you think the result of its execution would be. Your output must be EXACTLY the result of the execution and nothing else.
situation
system
import re 
  
# Regular expression to match all numeric strings 
pattern = '^[0-9]+$'
  
# Input string 
string = '123456789'
  
# Matching a pattern 
result = re.match(pattern, string) 
if result: 
    print("String is a valid numeric string") 
else: 
    print("String isn't a valid numeric string")
user
String is a valid numeric string
assistant