import re
def minsum(s):
    sum = 0
    tmp = re.findall("\-?\d+", s)
    for i in tmp:
        if int(i) > 0:
            for j in range(len(i)):
                sum += int(i[j])
        elif int(i) < 0:
            sum += int(i)
    print(sum)
while True:
    try:    
        s = input()
        minsum(s)
    except:
        break