filename = "input.txt"
s = 0

#letter = ["one", "two", "three", "four", "five", "six", "seven", "eight", "nine"]
dictLetter = {"one": "1", "two": "2", "three": "3", "four": "4", "five": "5", "six": "6", "seven": "7", "eight": "8", "nine": "9"}


with open(filename, 'r') as f:
    for line in f.readlines():
        mot=[]
        chaine = ""
        for car in line:
            if car.isdigit():
                mot.append(car)
            else:
                chaine = "".join([chaine, car])
                for l in dictLetter.keys():
                    #print(f"test {l} in {chaine}")
                    if l in chaine:
                        mot.append(dictLetter[l])
                        chaine = chaine[-1]
        #print(mot)
        s+=int( "".join([mot[0], mot[-1]]) )

print(s)