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

def findFirstDigitInString(string: str) -> str:
    lenght_of_string = len(string)
    i = 0
    while i < lenght_of_string:
        substring = string[i:i+5]
        if(string[i].isdigit()):
            return string[i]
        if (string[i].isalpha() ):
             digit = [x for x in spelled_out_digits if  substring.find(x) == 0 or  substring.find(x[::-1]) == 0]
             if  len(digit) != 0:
                return str(spelled_out_digits.index(digit[0]) + 1)
        i+=1

numbers = []
with open("input.txt") as file:
    line = file.readline()
    while line :
        firstdigit = findFirstDigitInString(line)
        lastdigit  = findFirstDigitInString(line[::-1])

        numbers.append(int(f"{firstdigit}{lastdigit}"))
        line = file.readline()

sum = 0
for n in numbers:
    sum += n
print(f"sum: {sum}")