#define FROZEN_GRID "Grid is frozen. Unfreeze grid first!"
#define UNFROZEN_GRID "Grid is unfrozen. Freeze grid first!"
#define EXCEED_GRID_SIZE "Row/col exceeded grid size!"
#define FROZEN_GRID "Grid is frozen. Unfreeze grid first!"
#define UNFROZEN_GRID "Grid is unfrozen. Freeze grid first!"
#define EXCEED_GRID_SIZE "Row/col exceeded grid size!"