Day 1 Part 2
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		@@ -11,14 +11,14 @@ cd "$(dirname "$0")"
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main ()
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{
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  numbers="[[:digit:]]|one|two|three|four|five|six|seven|eight|nine"
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  numbers_reverse="[[:digit:]]|eno|owt|eerht|ruof|evif|xis|neves|thgie|enin"
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  digit_regex="[[:digit:]]|one|two|three|four|five|six|seven|eight|nine"
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  digit_regex_reverse="[[:digit:]]|eno|owt|eerht|ruof|evif|xis|neves|thgie|enin"
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  declare -A digits=([one]=1 [two]=2 [three]=3 [four]=4 [five]=5 [six]=6 [seven]=7 [eight]=8 [nine]=9)
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  declare -a components
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  declare -i result=0
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  while read -r line; do
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    first=$(grep -E -o "${numbers}" <<< "${line}" | head -n 1)
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    last=$(rev <<< "${line}" | grep -E -o "${numbers_reverse}" | rev | head -n 1)
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    first=$(grep -E -o "${digit_regex}" <<< "${line}" | head -n 1)
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    last=$(rev <<< "${line}" | grep -E -o "${digit_regex_reverse}" | rev | head -n 1)
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    first=$([[ ! ${first} =~ ^[0-9]$ ]] && echo "${digits[${first}]}" || echo "${first}")
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    last=$([[ ! ${last} =~ ^[0-9]$ ]] && echo "${digits[${last}]}" || echo "${last}")
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    components+=("${first}${last}")
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