A.python

from sys import stdin
from sys import stdout
from random import shuffle


def main():
    input = stdin.readline()
    n = int(input.split(' ')[0])
    f = int(input.split(' ')[1])

    indexes = [i for i in range(n)]
    shuffle(indexes)

    next_query = ''
    i = 0
    while i < n:
        if i == n - 1:
            if f != n:
                print('%s%d' % (next_query, indexes[i] + 1), flush=True)
                stdin.readline()
            return

        j = i + 1
        print('%s%d %d' % (next_query, indexes[i] + 1, indexes[j] + 1), flush=True)
        next_query = ''
        line = stdin.readline()
        f_new = int(line)
        if f_new == n:
            return

        elif f_new - f == 2:
            f = f_new
            i = j + 1
            continue

        elif f_new - f == -2:
            next_query = '%d %d ' % (indexes[i] + 1, indexes[j] + 1)
            f = f_new + 2
            i = j + 1
            continue

        else:  # f_new - f can be only zero
            print('%d' % (indexes[i] + 1), flush=True)
            stdout.flush()
            line = stdin.readline()
            f_new = int(line)
            if f_new == n:
                return
            if f_new - f == -1 or f_new - f == 0:
                next_query = '%d %d ' % (indexes[i] + 1, indexes[j] + 1)
                f = f_new + 1
            i = j + 1
            continue

    return


if __name__ == '__main__':
    main()