#include <iostream>
#include <vector>
#include <string>

using namespace std;

int table[10][10] =
    {
     {0, 1, 2, 3, 4, 5, 6, 7, 8, 9},
     {1, 2, 3, 4, 5, 6, 7, 8, 9, 1},
     {2, 3, 4, 5, 6, 7, 8, 9, 1, 2},
     {3, 4, 5, 6, 7, 8, 9, 1, 2, 3},
     {4, 5, 6, 7, 8, 9, 1, 2, 3, 4},
     {5, 6, 7, 8, 9, 1, 2, 3, 4, 5},
     {6, 7, 8, 9, 1, 2, 3, 4, 5, 6},
     {7, 8, 9, 1, 2, 3, 4, 5, 6, 7},
     {8, 9, 1, 2, 3, 4, 5, 6, 7, 8},
     {9, 1, 2, 3, 4, 5, 6, 7, 8, 9}
    };

static vector<int> digitize(string s) {
    int size = s.length();
    vector<int> digits;
    for (int i=0; i<size; i++) {
        digits.push_back(s[i]-'0');
    }
    return digits;
}

static vector<int> add(vector<int> ss) {
    int size = ss.size();
    vector<int> added;
    for (int i=0; i<size-1; i++) {
        added.push_back(table[ss[i]][ss[i+1]]);
    }
    return added;
}

static int reduce(vector<int> ss) {
    int size = ss.size();
    vector<int> reduced = ss;
    for (int i=0; i<size-1; i++) {
        reduced = add(reduced);
    }
    return reduced[0];
}

int main(int argc, char* argv[]) {
    int T;
    string s;
    
    cin >> T;
    for (int i=0; i<T; i++) {
        cin >> s;
        vector<int> ss = digitize(s);
        int r = reduce(ss);
        cout << r << endl;
    }
}