from random import random
from math import floor

issue = [0]*19
for i in range(1, 100000+1) :
	somme=floor(6*random()+1)+floor(6*random()+1)+floor(6*random()+1)
	somme = int(somme)
	issue[somme]=issue[somme]+1
# maximum et mode
maxi = max(issue[3:])
print maxi
for i in range(3, 18+1) :
    if (issue[i]==maxi) :
        print i