import sys
# x = int(sys.argv[1])
# y = int(sys.argv[2])
# z = int(sys.argv[3])

song_arg2 = "Everybody sing a song:"
song_arg1 = "la"
song_arg3 = "-"
song_arg4 = " "
end_arg1 = "!"
end_arg2 = "."


def couplet(in_arg):
    if (in_arg % 2) == 0 and in_arg > 2:
        temp_str1 = song_arg1 + ("-la" * (in_arg - 1))
        return temp_str1
    if (in_arg % 2) == 1:
        temp_str1 = song_arg1 + "-la" * (in_arg - 1)
        return temp_str1
    elif in_arg == 1:
        return song_arg1


def quantity_of_couplet(in_arg1, in_arg2):
    temp_str3 = (couplet(in_arg2) + song_arg4) * in_arg1
    return temp_str3


def end_of_song(in_arg):
    temp_arg = in_arg
    if temp_arg == 0:
        string_2 = end_arg2
        return string_2
    elif temp_arg == 1:
        string_2 = end_arg1
        return string_2


def output_():
    global buffer_string, new_buf
    buffer_string = song_arg2 + " " + str(quantity_of_couplet(y, x)) + str(end_of_song(z))
    if buffer_string.__len__() > song_arg2.__len__() + 1:
        new_buf = buffer_string[0:len(buffer_string) - 2] + str(end_of_song(z))
        print new_buf
    else:
        print song_arg2 + str(quantity_of_couplet(y)) + str(end_of_song(z))


output_()