const v:array[1..100] of integer=(
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 t,i,x:longint;
    er:integer;
    s,q:string;
    f,g:text;
begin
     assign(f,'cifra.in');
     assign(g,'cifra.out');
     reset(f);
     rewrite(g);
     readln(f,t);
     for i:=1 to t do
              begin
                   q:='';
                   readln(f,s);
                   if length(s)>=2 then
                                 q:=q+s[length(s)-1]+s[length(s)]
                                   else
                                 q:=q+s[length(s)];
                   val(q,x,er);
                   writeln(g,v[x]);
              end;
     close(f);
     close(g);
end.