Day 1 Part 2

2023-12-01 17:11:47 +01:00
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+--- Part Two ---
+
+Your calculation isn't quite right. It looks like some of the
+digits are actually spelled out with letters: one, two, three, four, five, six,
+seven, eight, and nine also count as valid "digits".
+
+Equipped with this new information, you now need to find the real first and last
+digit on each line. For example:
+
+two1nine
+eightwothree
+abcone2threexyz
+xtwone3four
+4nineeightseven2
+zoneight234
+7pqrstsixteen
+
+In this example, the calibration values are 29, 83, 13, 24, 42, 14, and 76.
+Adding these together produces 281.
+
+What is the sum of all of the calibration values?