var f,g:text;
    t,i:longint;
    pc,uc:char;
    v:array[0..99] 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);
begin
assign(f,'cifra.in');reset(f);
assign(g,'cifra.out');rewrite(g);
readln(f,t);
for i:=1 to t do
    begin
    uc:='0';
    while not eoln(f) do
          begin
          aux:=uc;
          readln(f,uc);
          pc:=aux;
          end;
    uc:=ord(uc)-ord('0');
    pc:=ord(pc)-ord('0');
    writeln(g,v[pc*10+uc]);
    end;
close(f);
close(g);
end.