#define left_tee_mask_width 16
#define left_tee_mask_height 16
static short left_tee_mask_bits[] = {
   0x000f, 0x000f, 0x000f, 0x000f,
   0x000f, 0x000f, 0x0fff, 0x0fff,
   0x0fff, 0x0fff, 0x000f, 0x000f,
   0x000f, 0x000f, 0x000f, 0x000f};