#!/usr/bin/python
import sys, re
for line in sys.stdin:
    print re.sub("[A-Z]","#", line),

######################################
Explanation = """    
This program demonstrates the re
(regular expression) module.

It reads lines from the 'standard input'
(your terminal)

It converts all uppercase characters on the
input into hash marks (#).

   more about regular expressions: 
   http://www.aims.ac.za/resources/tutorials/regexp/

Note the comma at the end of the line.
It prevents python from printing the usual
newline at the end of line.
These lines already contain a newline.
"""