#include "../../include/aoc.hpp"
#include <bits/stdc++.h>
using namespace std;

size_t h(vector<char> &v) {
	size_t ret = 0;
	for (int i = 0; i < 4; i++) {
		ret += v[v.size() - 1 - i] << (i * 8);
	}
	return ret;
}

ll mp(ll n, ll o) { return (n ^ o) % 16777216; }

int main() {
	ios::sync_with_stdio(0);
	cin.tie(0);

	vector<int> secrets;
	ll n;
	while (cin >> n) {
		secrets.push_back(n);
	}

	unordered_map<size_t, int> m;
	for (ll s : secrets) {
		char sp = s % 10;
		vector<char> ss;
		unordered_set<size_t> done;
		for (int i = 0; i < 2000; i++) {
			char oldsp = sp;
			s = mp(s * 64, s);
			s = mp(s / 32, s);
			s = mp(s * 2048, s);
			sp = s % 10;
			ss.push_back(sp - oldsp);
			if (ss.size() >= 4) {
				auto hss = h(ss);
				if (done.contains(hss)) {
					continue;
				}
				done.insert(hss);
				m[hss] += sp;
			}
		}
	}

	int mx = 0;
	for (auto n : m) {
		if (n.second > mx) {
			mx = n.second;
		}
	}
	cout << mx << '\n';
}