def greedy(cities,current_city,dist):
    N = len(cities)
    unvisited_cities = set(range(0, N))
    tour = [current_city]
    unvisited_cities.remove(current_city)

    while unvisited_cities:
        next_city = min(unvisited_cities,
                        key=lambda city: dist[current_city][city])
        unvisited_cities.remove(next_city)
        tour.append(next_city)
        current_city = next_city
    return tour,dist

# ====================
N, M = map(int, input().split())
planet = [tuple(map(int, input().split())) for _ in range(N)]
dist = [[0 for _ in range(N)] for _ in range(N)]
for i in range(N):
    for j in range(N):
        p1 = planet[i]
        p2 = planet[j]
        D = (p1[0] - p2[0]) ** 2 + (p1[1] - p2[1]) ** 2
        dist[i][j] = D
tour, dis = greedy(planet, 0, dist)
for _ in range(M):print(*planet[0])
print(len(tour)+1)
for i in range(len(tour)):print(1, tour[i]+1)
print(1, 1)