#include <bits/stdc++.h>
#define rep(i,n) for(int i=0;i<n;i++)
//#define int long long
using namespace std;
typedef long long ll;

int T;
string S;
string S2;

signed main()
{
	cin >> T;
	rep(i,T) {
		cin >> S;
		while (S.length() > 1) {
			S2 = "";
			rep(j,S.length()-1) {
				int a = S[j] - '0';
				int b = S[j+1] - '0';
				if (a + b > 9) {
					S2 += ((int)((a + b) / 10) + (a + b) % 10) + '0';
				} else {
					S2 += (char)('0' + a + b);
				}
			}
			S = S2;
		}
		cout << S << endl;
	}
}