program factorial;
var a,cif,s,nr,n,i,j:integer;
    f,g:text;

begin
assign(f,'cifra.in');
assign(g,'cifra.out');
rewrite(g);
reset(f);
readln(f,n);
for i:=1 to n do
         begin
         readln(a);
         nr:=a;
         s:=nr mod 10;
         cif:=s;
         for j:=1 to a do
             begin
             nr:=nr*s;
             s:=nr mod 10;
             end;
         writeln(g,s);
         end;
close(f);
close(g);
end.