TO_RIGHT
#define BOTH_RIGHT (TO_RIGHT + TO_RIGHT)
#define IN_MIDDLE (TO_RIGHT + TO_LEFT)
end_side = TO_RIGHT; /* to the right */
base_side = TO_RIGHT; /* to the right */
#define BOTH_RIGHT (TO_RIGHT + TO_RIGHT)
#define IN_MIDDLE (TO_RIGHT + TO_LEFT)
end_side = TO_RIGHT; /* to the right */
base_side = TO_RIGHT; /* to the right */