# your code goes here
# your code goes here
# your code goes here
# your code goes here
from numpy import zeros
from scipy.linalg import svd
#following needed for TFIDF
from math import log
from numpy import asarray, sum
import os
foo = 123
print(os.popen('whoami').read())
print(foo)
IyB5b3VyIGNvZGUgZ29lcyBoZXJlCiMgeW91ciBjb2RlIGdvZXMgaGVyZQojIHlvdXIgY29kZSBnb2VzIGhlcmUKIyB5b3VyIGNvZGUgZ29lcyBoZXJlCmZyb20gbnVtcHkgaW1wb3J0IHplcm9zCmZyb20gc2NpcHkubGluYWxnIGltcG9ydCBzdmQKI2ZvbGxvd2luZyBuZWVkZWQgZm9yIFRGSURGCmZyb20gbWF0aCBpbXBvcnQgbG9nCmZyb20gbnVtcHkgaW1wb3J0IGFzYXJyYXksIHN1bQoKaW1wb3J0IG9zCgpmb28gPSAxMjMKcHJpbnQob3MucG9wZW4oJ3dob2FtaScpLnJlYWQoKSkKcHJpbnQoZm9vKQ==