25 50 -------------------------------------------------- -------------------------------------------------- -------------------------------------------------- -------------------------------------------------- -------------------------------------------------- -------------------------------------------------- ------------------X-X-X-X-X----------------------- ------------------XXXXXXXXXXX--------------------- -----------------XX--------X---------------------- ------------------X--------XX--------------------- -----------------XX--------X---------------------- ------------------X--------XX--------------------- -----------------XX--------X---------------------- ------------------X--------XX--------------------- -----------------XX--------X---------------------- ------------------X--------XX--------------------- -----------------XXXXXXXXXXX---------------------- -------------------X-X-X-X-X---------------------- -------------------------------------------------- -------------------------------------------------- -------------------------------------------------- -------------------------------------------------- -------------------------------------------------- -------------------------------------------------- --------------------------------------------------