import math
text: str

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

total: int  = 0

for line in text.splitlines():
    lst = [int(char) for char in line]
    first_max_value = max(lst[:-1])
    first_max_index = lst.index(first_max_value)
    second_max_value = max(lst[first_max_index + 1:])
    total += first_max_value * 10 + second_max_value


print(total)