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#include <iostream>
#include <fstream>
#include <cstring>
using namespace std;
ifstream fin("cifra.in");
ofstream fout("cifra.out");
char sir[105];
int n,x;
int v[25];
void precalc()
{
v[1]=1;
v[2]=4;
v[3]=7;
v[4]=6;
v[5]=5;
v[6]=6;
v[7]=3;
v[8]=6;
v[9]=9;
v[10]=0;
v[11]=1;
v[12]=6;
v[13]=3;
v[14]=6;
v[15]=5;
v[16]=6;
v[17]=7;
v[18]=4;
v[19]=9;
}
int cifra(int x)
{
int a=x/20;
int b=x%20;
int s=0;
s+=8*a;
for(int i=1;i<=b;i++)
{
s+=v[i];
}
s=s%10;
return s;
}
void solve()
{
int x;
fin>>n;
for(int i=1;i<=n;i++)
{
fin>>(sir+1);
int lg=strlen(sir+1);
if(lg>1)
{
x=(sir[lg-1]-'0')*10+(sir[lg]-'0');
}
else
{
x=sir[lg]-'0';
}
fout<<cifra(x);
}
}
int main()
{
precalc();
solve();
return 0;
}