Day 1 part 2 code (not working)

#file1 = open('./1/input.txt', 'r')
#lines = file1.readlines()
lines = ["oneghj","neighthreeb", "2sevenjddn2hbk5f6nine"]

words = ["one", "two", "three", "four", "five", "six", "seven", "eight", "nine"]


sum = 0

for line in lines:
    count = 0
    nums = []
    indeces = []
    # find the words, take down the index of the first letter and the number value
    for w in range(len(words)):
        i = line.find(words[w])
        if i > -1:
            indeces.append(i)
            nums.append(str(w+1))
    # find the numbers, take down their indeces and values
    for l in range(len(line)):
        c = line[l]
        if c.isdigit():
            #print(l)
            indeces.append(l)
            nums.append(c)
    # find the lowest index and max index (first and last number, if if their the same)
    mn = min(indeces)
    mx = max(indeces)
    print(nums[indeces.index(mn)] + nums[indeces.index(mx)])
    # concatenate the strings then add to the total
    sum += int(nums[indeces.index(mn)] + nums[indeces.index(mx)])

print(sum)