Advent of code d3

Only showing the phase 2 solution here. Becuase it is so far removed from the phase 1 solution, that I'd have to re-implement phase 1.

import traceback

result = 0
try:
    with open("day3-input.txt", "r") as f:
        for line in f.readlines():
            line = line.strip()
            if not line:
                continue
            start = 0
            found = []
            for i in range(12):
                rem = 12 - (i + 1)
                limit = len(line) - rem
                d = line[start]
                index = start
                for j in range(start, limit):
                    if int(line[j]) > int(d):
                    d = line[j]
                        index = j
                        if d == "9":
                            break

                found.append(d)
                start = index + 1
            result += int("".join(found))
except Exception as e:
    traceback.print_exc()

print(result)