9-И-2 ex.9

# -*- coding: utf-8 -*-
"""
Created on Sat Nov 21 20:31:21 2020

@author: Sergey
"""

a=input()
data=[a[0], a[1], a[2], a[3]]
ans=[]
for i in range(4):
    data1=data.copy()
    s1=data[i]
    data1.pop(i)
    for j in range(3):
        data2=data1.copy()
        s2=data1[j]
        data2.pop(j)
        for k in range(2):
            data3=data2.copy()
            s3=data2[k]
            data3.pop(k)
            s4=data3.pop(0)
            ans.append(s1+s2+s3+s4)
ans1=list(set(ans))
print(len(ans1))