lines = [i for i in open("input.txt", 'r').read().splitlines()]

sum = 0
nonqual = ['0','1','2','3','4','5','6','7','8','9','.']

for i in range(len(lines)):
    columns = len(lines[i])
    j = 0
    while j < columns:
        if lines[i][j].isnumeric():
            num = ""
            valid = False
            for k in range(len(lines[i])):
                if j+k >= columns:
                    break
                if lines[i][j+k].isnumeric():
                    num += lines[i][j+k]
                else:
                    break
            lennum = len(num)
            for x in range(0 if j == 0 else j-1, columns if j + lennum == columns else j+lennum+1):
                if i != 0:
                    if not lines[i-1][x] in nonqual:
                        valid = True
                if i != len(lines)-1:
                    if not lines[i+1][x] in nonqual:
                        valid = True
            if j != 0 and not lines[i][j-1] in nonqual:
                valid = True
            if j+lennum != columns and not lines[i][j+lennum] in nonqual: 
                valid = True
            if valid:
                sum += int(num)
            j += lennum
        j += 1

print(sum)