print '\n                     Crackme ver 1.0\n                     Coded by M3g4tr0n\n                     Language: Pyth0n\n                     Rules: No Patching\n'
import sys 
if (len(sys.argv) != 2):
    print 'Usage: ./crackme1.pyc your_input'
    exit()
serial = sys.argv[1]
try:
    f = open('keys')
except:
    print 'Error'
    exit()
for line in f:
    if (str(line) == serial):
        print 'Good boy'
        exit()
    else:
        print 'Bad boy! Bad boy'
        exit()

exit()