var f,g:text;
        v:array[1..200]of integer;
        x,z,y,n,t,i,j,s:integer;
begin
assign(f,'cifra.in');reset(f);
assign(g,'cifra.out');rewrite(g);
readln(f,t);
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;
x:=7;
for i:=1 to t do begin  s:=0;
                        readln(f,n);
                        y:=n div 10;
                        z:=n mod 10;
                        s:=x*y;
                        for j:=1 to z do s:=s+v[j];
                        writeln(g,s mod 10);
                        end;
write('sunt fraiera0');
close(f);
close(g);
end.