diff --git a/2023/day-1/part_two.go b/2023/day-1/part_two.go
index 03ab1fd..d652a4f 100644
--- a/2023/day-1/part_two.go
+++ b/2023/day-1/part_two.go
@@ -17,62 +17,61 @@ const (
 )
 
 func partTwoCalculateSumCalibrationValues(document []string) int {
-	var (
-		digits []int
-		sum    int
-	)
+	sum := 0
 
 	for _, line := range document {
-		sum = sum + partTwoCalibrationValue(line, digits)
+		sum = sum + partTwoCalibrationValue(line)
 	}
 
 	return sum
 }
 
-func partTwoCalibrationValue(line string, digits []int) int {
-	if len(line) > 0 {
+func partTwoCalibrationValue(line string) int {
+	var digits []int
+
+	for len(line) > 0 {
 		switch {
 		case (line[0] >= '0') && (line[0] <= '9'):
 			digits = append(digits, int(line[0]-'0'))
-			return partTwoCalibrationValue(line[1:], digits)
+			line = line[1:]
 		case strings.HasPrefix(line, one):
 			digits = append(digits, 1)
 			trimLength := len(one) - 1
-			return partTwoCalibrationValue(line[trimLength:], digits)
+			line = line[trimLength:]
 		case strings.HasPrefix(line, two):
 			digits = append(digits, 2)
 			trimLength := len(two) - 1
-			return partTwoCalibrationValue(line[trimLength:], digits)
+			line = line[trimLength:]
 		case strings.HasPrefix(line, three):
 			digits = append(digits, 3)
 			trimLength := len(three) - 1
-			return partTwoCalibrationValue(line[trimLength:], digits)
+			line = line[trimLength:]
 		case strings.HasPrefix(line, four):
 			digits = append(digits, 4)
 			trimLength := len(four) - 1
-			return partTwoCalibrationValue(line[trimLength:], digits)
+			line = line[trimLength:]
 		case strings.HasPrefix(line, five):
 			digits = append(digits, 5)
 			trimLength := len(five) - 1
-			return partTwoCalibrationValue(line[trimLength:], digits)
+			line = line[trimLength:]
 		case strings.HasPrefix(line, six):
 			digits = append(digits, 6)
 			trimLength := len(six) - 1
-			return partTwoCalibrationValue(line[trimLength:], digits)
+			line = line[trimLength:]
 		case strings.HasPrefix(line, seven):
 			digits = append(digits, 7)
 			trimLength := len(seven) - 1
-			return partTwoCalibrationValue(line[trimLength:], digits)
+			line = line[trimLength:]
 		case strings.HasPrefix(line, eight):
 			digits = append(digits, 8)
 			trimLength := len(eight) - 1
-			return partTwoCalibrationValue(line[trimLength:], digits)
+			line = line[trimLength:]
 		case strings.HasPrefix(line, nine):
 			digits = append(digits, 9)
 			trimLength := len(nine) - 1
-			return partTwoCalibrationValue(line[trimLength:], digits)
+			line = line[trimLength:]
 		default:
-			return partTwoCalibrationValue(line[1:], digits)
+			line = line[1:]
 		}
 	}