def main():
    N, K = [int(i) for i in input().split()]
    things = [input() for _ in range(3*N)]

    occ = {}

    for i in range(len(things)):
        t = things[i]
        if t not in occ:
            occ[t] = (0, i)
        occ[t] = (occ[t][0]+1, i)

    # nb d'apparition, date de première apparition, texte
    data = [(occ[i][0], occ[i][1], i) for i in occ.keys()]
    data.sort(key=lambda x: (x[0], x[1]), reverse=True)

    cursor = 0
    while cursor < K and cursor < len(data):
        print(data[cursor][2])
        cursor += 1


main()