#include <bits/stdc++.h>
#define PI 3.14159265359
using namespace std;
const int64_t MOD = 1e9 + 7;

int main() {
	int T;
	cin >> T;

	for (int i = 0; i < T; i++) {
		string s;
		cin >> s;

		//for (int j = 0; j < s.size(); j++) {
		//	cout << s.at(j) << endl;
		//}

		while (s.size() > 1) {
			for (int j = 0; j < s.size() - 1; j++) {
				string a, b;
				a = s.at(j);
				b = s.at(j + 1);
				//cout << j << endl;
				//cout << "a:" << a << ' ' << "b:" << b << endl;

				int n, m;
				n = stoi(a);
				m = stoi(b);
				//cout << "n:" << n << ' ' << "m:" << m << endl;

				n += m;
				if (n > 9) {
					n = n / 10 + n % 10;
				}

				s.at(j) = (char)n + 48;
			}

			s = s.substr(0, s.size() - 1);
		}

		cout << s << endl;
	}
}