int prompt_values(WINDOW* windows, int base_y, int base_x, const char* msg, int* y, char* x);
-int map_col_letter_to_int(char c);
+int map_col_letter_to_index(char c);
+char map_col_index_to_letter(int index);
/* ncurses printing */
void print_board(int y, int x);