#include <iostream>
#include <fstream>
//#include <sstream>
using namespace std;
int main()
{
int n;
short rez[10][10] =
{{0,1,5,2,8,3,9,2,8,7},
{7,8,4,7,3,8,4,1,5,4},
{4,5,9,2,8,3,9,2,8,7},
{1,2,8,5,1,6,2,9,3,2},
{8,9,3,6,2,7,3,6,2,1},
{5,6,2,5,1,6,2,9,3,2},
{2,3,2,4,0,5,1,4,0,9},
{9,0,6,9,5,0,6,3,7,6},
{6,7,1,4,0,5,1,4,0,9},
{3,4,0,7,3,8,4,1,5,4}};
//stringstream sirc (stringstream::in | stringstream::out);
//string sir;
ifstream f1 ("cifra.in");
ofstream f2 ("cifra.out");
if (f1.is_open())
{
while (! f1.eof())
{
f1>>n;
for (int i=0; i<n; ++i)
{
short uc,pc,nc;
char sirc[2];
char sir[100];
f1>>sir;
if (strlen(sir) >=2)
{
sirc[0] = sir[strlen(sir)-2];
sirc[1] = sir[strlen(sir)-1];
nc = atoi(sirc);
uc=nc%10;
nc=nc/10;
pc=nc%10;
}
else
{
sirc[0] = sir[strlen(sir)-1];
sirc[1] = 0;
nc = atoi(sirc);
uc=nc%10;
pc=0;
}
//sir.clear();
f2<<rez[pc][uc]<<"\n";
}
}
}
f1.close();
f2.close();
return 0;
}