"""The baseline: nearest neighbour. Reads the points as JSON on stdin and prints the tour as JSON."""
import json
import math
import sys

p = json.load(sys.stdin)
left, tour = set(range(1, len(p))), [0]
while left:
    nxt = min(left, key=lambda j: math.dist(p[tour[-1]], p[j]))
    left.remove(nxt)
    tour.append(nxt)
print(json.dumps(tour))