#include <iostream.h>
#include <fstream.h>
#include <math.h>
int main()
{
ifstream f("cifra.in");
ofstream g("cifra.out");
int t,i,j,s,cf;
int  Sol[]={0,1,5,2,8,3,9,2,8,7,7,8,4,7,3,8,4,1,5,4,4,5,
9,6,2,7,3,6,2,1,1,2,8,1,7,2,8,5,9,8,8,9,3,0,6,1,7,0,6,5,
5,6,2,5,1,6,2,9,3,2,2,3,7,4,0,5,1,4,0,9,9,0,6,9,5,0,6,3,
7,6,6,7,1,8,4,9,5,8,4,3,3,4,0,3,9,4,0,7,1,0};   
char n[1001];
f>>t;
for (i=0;i<t;i++)
    {
    f>>n;
    cf=n[strlen(n)-1]-48;
    if (strlen(n)>1)
       cf+=(n[strlen(n)-2]-48)*10;   
    g<<Sol[cf]<<"\n";   
    }
f.close();
g.close();
return 0;
}