kaijou = [1]
1.upto(8){|i|
    kaijou.push(i * kaijou[i - 1])
    }

s = gets.chomp
s_len = s.length
s_hash = Hash.new(0)
s.split('').each{|char|
    s_hash[char] += 1
    }
p kaijou[s_len] / [1,*s_hash.values].inject{|pro,n|pro * kaijou[n]} - 1