from sys import stdin
username = None
password = None
x = 0
def eval_box(username, password, x):
x+=1
print(x)
print(username)
print(password)
if username == None: username, password, garbage = eval_box(stdin.readline(), password, x)
if password == None: username, password, garbage = eval_box(username, stdin.readline(), x)
#DO AUTH
token = username+password
print(token)
return username, password, token
username, password, token = eval_box(username, password, x)
print('done')
print(username)