+#define INPUT_CONFIRM_RESET "Are you sure? This will destroy the entire grid\
+and is irreversible (y/N): "
+
+#define USAGE_LINE_1 "Usage: %s [<filename> [new <nn>]]\n"
+#define USAGE_LINE_2 "<filename> - puzzle file name\n"
+#define USAGE_LINE_3 "new <nn> - create new puzzle with <nn> grid \
+columns (warning: existing file name may be overwritten)\n"