#define _USE_MATH_DEFINES
#include<stdio.h>
#include<string>
#include<iostream>
#include<cctype>
#include<cstdio>
#include<vector>
#include<stack>
#include<algorithm>
#include<math.h>
#include<set>
#include<map>
#include<iomanip>
#include<queue>
using namespace std;

int fac(int x) {
	if (x <= 1)return 1;
	else return x*fac(x - 1);
}

int check(string s) {
	int n = s.length() - 1;
	int sum = 0;
	int Ans;
	for (int i = 0; i <= n;i++) {
		//cout << fac(n) << " " << fac(i) << " " << fac(n)/fac(i) << endl;
		sum += (fac(n) / (fac(i)*fac(n - i))*(s[i] - '0'));
		//cout << sum << endl;
	}
	Ans = (sum % 10) + sum / 10;
	while (Ans >= 10) {
		Ans = Ans % 10 + Ans / 10;
	}
	return Ans;
}

int main() {
	cin.tie(0); ios::sync_with_stdio(false);
	int T; cin >> T;
	vector<string> S(T);
	for (int i = 0; i < T; i++) {
		cin >> S[i];
	}
	for (int i = 0; i < T;i++) {
		cout << check(S[i]) << endl;
	}
	return 0;
}