if (n >= MIN && n <= MAX) {
number = n;
if (n <= MAX_B) letter = 'B";
else if (n <= MAX_I) letter = 'I";
else if (n <= MAX_N) letter = 'N";
else if (n <= MAX_G) letter = 'G";
else if (n <= MAX_O) letter = 'O";
} else if (n == GAME_OVER) {
number = GAME_OVER;
letter = ' ";
} else {
number = FREE_SPACE;
letter = ' ";
}