#include <bits/stdc++.h>
#define startt ios_base::sync_with_stdio(false);cin.tie(0);
typedef long long  ll;
using namespace std;
#define vint vector<int>
#define all(v) v.begin(), v.end()
#define MOD 1000000007
#define MOD2 998244353
#define MX 1000000000
#define MXL 1000000000000000000
#define PI (ld)2*acos(0.0)
#define nax 200005
#define pb push_back
#define sc second
#define fr first
#define int long long
#define endl '\n'
#define ld long double
#define NO cout << "NO" << endl
#define YES cout << "YES" << endl
int ceildiv(int one, int two) {if (one % two == 0) {return one / two;}else {return one / two + 1;}} int power(int n, int pow, int m) {if (pow == 0) return 1;if (pow % 2 == 0) {ll x = power(n, pow / 2, m);return (x * x) % m;}else return (power(n, pow - 1, m) * n) % m;} int gcd(int a, int b) { if (!b)return a; return gcd(b, a % b);} int factorial(int n, int mod) {if (n > 1)return (n * factorial(n - 1, mod)) % mod; else return 1;} int lcm(int a, int b) {return (a * b) / gcd(a, b);} vector<int> read(int n) {vector<int> a; for (int i = 0; i < n; i++) { int x; cin >> x; a.pb(x);} return a;}struct prefix_sum{vint pref;void build(vint a){pref.pb(0);for(int i = 0; i < a.size(); i++){pref.pb(pref.back()+a[i]);}}int get(int l, int r){return pref[r]-pref[l-1];}};//ssense
vector<int> p;

void solve()
{
	string s;
	cin >> s;
	int ans = 0;
	int now;
	if(s.size() > 3)
	{
		now = stoi(s.substr(s.size()-3, s.size()-1));
	}
	else
	{
		now = stoi(s);
	}
	now%=100;
	cout << p[now] << endl;
}

int32_t main(){
	startt
	freopen("cifra.in", "r", stdin);
	freopen("cifra.out", "w", stdout);
	p.pb(0);
	for(int i = 1; i <= 100; i++)
	{
		if(i%4 == 0)
		{
			p.pb((power(i%10, 4, MXL)+p.back())%10);
		}
		else
		{
			p.pb((power(i%10, i%4, MXL)+p.back())%10);
		}
	}
	int t = 1;
	cin >> t;
	while (t--) {
		solve();
	}
}