#!/bin/sh

sum=0
while read line; do
    num1="$(echo "$line" | sed -n 's/^[^0-9]*\([0-9]\).*/\1/p')"
    num2="$(echo "$line" | sed -n 's/.*\([0-9]\)[^0-9]*$/\1/p')"
    sum=$(( $sum + $num1$num2 ))
done < d01_input.txt
echo "$sum"

sum=0
while read line; do
    line1="$(echo "$line" | sed \
        -e 's/\(one\|two\|three\|four\|five\|six\|seven\|eight\|nine\)/%\1%/' \
        -e 's/%one%/1/' \
        -e 's/%two%/2/' \
        -e 's/%three%/3/' \
        -e 's/%four%/4/' \
        -e 's/%five%/5/' \
        -e 's/%six%/6/' \
        -e 's/%seven%/7/' \
        -e 's/%eight%/8/' \
        -e 's/%nine%/9/')"
    line2="$(echo "$line" | sed \
        -e 's/.*\(one\|two\|three\|four\|five\|six\|seven\|eight\|nine\)/%\1%/' \
        -e 's/%one%/1/' \
        -e 's/%two%/2/' \
        -e 's/%three%/3/' \
        -e 's/%four%/4/' \
        -e 's/%five%/5/' \
        -e 's/%six%/6/' \
        -e 's/%seven%/7/' \
        -e 's/%eight%/8/' \
        -e 's/%nine%/9/')"
    num1="$(echo "$line1" | sed -n 's/^[^0-9]*\([0-9]\).*/\1/p')"
    num2="$(echo "$line2" | sed -n 's/.*\([0-9]\)[^0-9]*$/\1/p')"
    sum=$(( $sum + $num1$num2 ))
done < d01_input.txt
echo "$sum"