2023(1): Treat written digits as digits

This is wrong, though, as cases like `oneight` should return `83` whereas
I replace the `one`s first, so that `1ight` will remain that way.

See <https://www.reddit.com/r/adventofcode/comments/1884fpl/2023_day_1for_those_who_stuck_on_part_2/>.

2023/day/1/main.rs

@@ -9,8 +9,32 @@ fn main() {
 	if let Ok(lines) = read_lines("./input") {
 		for line in lines {
 			if let Ok(text) = line {
-				sum = sum + first_digit(&text);
-				mus = mus + last_digit(&text);
+				// TODO: Please us something like a collection instead of
+				// hardcoding every replacement.
+				let sanitext = text
+					.replace("one",   "1")
+					.replace("two",	  "2")
+					.replace("three", "3")
+					.replace("four",  "4")
+					.replace("five",  "5")
+					.replace("six",   "6")
+					.replace("seven", "7")
+					.replace("eight", "8")
+					.replace("nine",  "9")
+					;
+				// DEBUG:
+				println!(
+					"{} => {} yields {} + {} = {}",
+					text,
+					sanitext,
+					first_digit(&sanitext),
+					last_digit(&sanitext),
+					first_digit(&sanitext) + last_digit(&sanitext)
+				);
+				sum = sum + first_digit(&sanitext);
+				mus = mus + last_digit(&sanitext);
+			} else {
+				println!("Error on line \"{:?}\"", line);
 			}
 		}
 	}