c1-d

/*
 Author: 曹北健
 Result: AC Submission_id: 4281659
 Created at: Thu Apr 07 2022 19:18:52 GMT+0800 (China Standard Time)
 Problem_id: 5510   Time: 66    Memory: 8532
*/

import math
from operator import contains
if __name__=='__main__':
    d={}
    x=str.split(input())
    for i in x:
        try:
            d[i]+=1
        except:
            d[i]=1
    pass
    x=str.split(input())
    for i in x:
        try:
            d[i]+=1
        except:
            d[i]=1
    pass
    x=str.split(input())
    for i in x:
        try:
            d[i]+=1
        except:
            d[i]=1
    pass
    t=0
    for k in d.keys():
        if(d[k]==3):
            t+=1
    print(t)