#!/usr/bin/python3

N = int(input())
koule = list(map(int, input().split())) #nacteme koule
print(int(N/3)) #snehulaku bude tretina kouli
for i in range(0, N, 3): # jdeme po koulich
    snehulak = [koule[i], koule[i+1], koule[i+2]]
    snehulak.sort() # seradime koule
    print(snehulak[2], snehulak[1], snehulak[0])