program ywtvr;
const v:array[0..99]of byte=(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);
var n,np:byte;
    t,i,e:word;
    c1,c2:char;
    f,g:text;
begin
 assign(f,'cifra.in');reset(f);
 readln(f,t);
 assign(g,'cifra.out');rewrite(g);
 for i:=1 to t do
  begin
   c1:='0';c2:='0';
   while not seekeoln(f) do
    begin
     c1:=c2;
     read(f,c2);
    end;
   readln(f);
   val(c1,n,e);
   n:=n*10;
   val(c2,np,e);
   inc(n,np);
   writeln(g,v[n]);
  end;
close(f);close(g);
end.