import math
text: str

with open("input.txt") as f:
    text = f.read()

total: int  = 0
for start, stop in [line.split("-") for line in text.split(",")]:
    for value in range(int(start), int(stop) + 1):
        length: int = int(math.log10(value))
        if length % 2 == 1:
            value_str: str = str(value)
            if (value_str[0:length // 2 + 1] == value_str[length // 2 + 1:]):
                total += value

print(total)