Lowercase to Uppercase

#Question
#Write a program that accepts sequence of lines as input and prints the lines after making all characters in the sentence capitalized.
#Suppose the following input is supplied to the program:
#Hello world
#Practice makes perfect
#Then, the output should be:
#HELLO WORLD
#PRACTICE MAKES PERFECT

##Hints:
#In case of input data being supplied to the question, it should be assumed to be a console input.

stopword=""
while True:
    str=raw_input()
    if str.strip()==stopword:
        break
print str.upper()