# https://www.hackerrank.com/challenges/default-arguments/problem

class EvenStream(object):

def __init__(self):

self.current = 0

def get_next(self):

to_return = self.current

self.current += 2

return to_return

class OddStream(object):

def __init__(self):

self.current = 1

def get_next(self):

to_return = self.current

self.current += 2

return to_return

def print_from_stream(n, stream=EvenStream()):

stream.__init__()

for _ in range(n):

print(stream.get_next())

queries = int(input())

for _ in range(queries):

stream_name, n = input().split()

n = int(n)

if stream_name == "even":

print_from_stream(n)

else:

print_from_stream(n, OddStream())