#include<bits/stdc++.h>
using namespace std;
int main(){
	int i,a[50]={0},b[20]={0},z=0,x=0;
	for(i=0;i<50;i++){
		cin>>a[i];
	}
	for(i=0;i<50;i++){
		b[a[i]]++;
	}
	z=b[0];
	x=0;
	for(i=1;i<20;i++){
		if(z<b[i]){
			z=b[i];
			x=i;
		}
	}
	cout<<b[i];
}
/**************************************************************
	Problem: 1180
	User: linzihang
	Language: C++
	Result: Wrong Answer
****************************************************************/