#!/usr/bin/python

from operator import mul, add

def fac(i): return 1 if i == 0 else reduce(mul, xrange(1, i + 1))

def uniqueterms(i):
	fac_chain = [i]
	while len(set(fac_chain)) == len(fac_chain):
		fac_chain.append(sum(fac(int(i)) for i in str(fac_chain[len(fac_chain) - 1]))) 
	return len(fac_chain)-1