#define surd_width 16
#define surd_height 16
#define surd_x_hot -1
#define surd_y_hot -1
static char surd_bits[] = {
   0x00, 0x00, 0x00, 0x60, 0x00, 0x30, 0x00, 0x10, 0x00, 0x18, 0x00, 0x08,
   0x00, 0x0c, 0x00, 0x04, 0x00, 0x06, 0x07, 0x02, 0x04, 0x03, 0x0c, 0x01,
   0x98, 0x01, 0x90, 0x00, 0xf0, 0x00, 0x60, 0x00};