raw_input = open('input.txt', "r").read().split(',')
input = []

for item in raw_input:
    input.append(item.split('-'))

answer = 0
invalid_numbers = []

for item in input:
    for i in range(int(item[0]), int(item[1]) + 1):
        str_i = str(i)
        if len(str_i) % 2 == 0:
            halfway = int(len(str_i)/2)
            if str_i[0:halfway] == str_i[halfway:]:
                answer += i
                invalid_numbers.append(i)

print(answer)