#include <bits/stdc++.h>

using namespace std;
typedef long long ll;
#define REP(i,n) for(int i=0; i<int(n); i++)
#define FOR(i,m,n) for(int i=int(m); i<int(n); i++)
#define ALL(obj) (obj).begin(),(obj).end()
#define VI vector<int>
#define VLL vector<long long>
#define VVI vector<vector<int>>
#define VVLL vector<vector<long long>>
#define VC vector<char>
#define VS vector<string>
#define VVC vector<vector<char>>
#define fore(i,a) for(auto &i:a)

typedef pair <int, int> P;
template<class T> bool chmax(T &a, T b) { if (a < b) { a = b; return true; } return false; }
template<class T> bool chmin(T &a, T b) { if (a > b) { a = b; return true; } return false; }
const int  INF = 2147483647;
const ll INFL = 9223372036854775807;
const ll mod = 1000000007;



int main() {

	int T;
	cin >> T;

	REP(i, T) {
		string s;
		cin >> s;
		while (s.size() != 1) {
			string t;
			REP(j, s.size() - 1) {
				int n = s[j] - '0';
				int m = s[j + 1] - '0';
				n += m;
				n = n / 10 + n % 10;
				char c = n + '0';
				t += c;
			}
			s = t;
		}
		cout << s << endl;
	}
	
	return 0;
	
}