#!/usr/local/bin/python2
from hashlib import sha256

target_str = 'Blockchain Daigakko'

for i in range(100):
    keyword = '{}{}'.format(target_str, i)
    hexdigest = sha256(sha256(keyword).digest()).digest()[::-1].encode('hex') # LEにする
    if hexdigest[0:2] == '00':
        print hexdigest