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 s:string[100];
    t:integer;
    f,g:text;
    n:byte;
procedure load;
var l,u,z:byte;
    i,er:integer;
begin
assign(f,'cifra.in');reset(f);
assign(g,'cifra.out');rewrite(g);
readln(f,t);
for i:=1 to t do
 begin
  readln(f,s);
  l:=length(s);
  val(s[l],u,er);
  val(s[l-1],z,er);
  n:=z*10+u;
  writeln(g,v[n]);
 end;
end;
BEGIN
load;
close(f);close(g);
END.