#!/bin/python3
import sys,re
from pprint import pprint

input_f = 'input'

part = -1
#########################################
#                                       #
#              Part 1                   #
#                                       #
#########################################
if part == 1:
     with open(input_f) as file:
        for line in file:
            clean_string = re.sub(r"!.", "", line.rstrip())
            clean_string = re.sub(r"<.*?>", "", clean_string)
            clean_string = re.sub(r",", "", clean_string)
            level = 0
            numbers = []
            for i in clean_string:
                if i == '{':
                    level += 1
                if i == '}':
                    numbers.append(level)
                    level -= 1

            print(sum(numbers))

#########################################
#                                       #
#              Part 2                   #
#                                       #
#########################################
if part == 2:
    exit()