def is_invalid_id(n: int) -> bool:
    s = str(n)
    if len(s) % 2 != 0:
        return False
    half = len(s) // 2
    return s[:half] == s[half:]


total = 0

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

for part in line.split(","):
    lo, hi = map(int, part.split("-"))
    for n in range(lo, hi + 1):
        if is_invalid_id(n):
            total += n

print(total)