# Write a Python program to concatenate the consecutive numbers in a given string.  
 import re
txt = "Enter at 1 20 Kearny Street. The security desk can direct you to floor 1 6. Please have your identification ready."
print("Original string:")
print(txt)
new_txt = re.sub(r"(?<=\d)\s(?=\d)", '', txt)
print('\nAfter concatenating the consecutive numbers in the said string:')
print(new_txt)
