# import string 
# import random

# def load_words():

#     word_list=["navgurukul","learning","kindness"]
#     return word_list

# def choose_word():

#     word_list=load_words()
#     secret_word=random.choice(word_list)
#     secret_word=secret_word.lower()

#     return secret_word
    
    



def main(a,b):
    k=a-b
    print(k)

main(1000,900)

