#!/usr/bin/env python3
import sys
from collections import defaultdict

match = {
    "}": "{",
    ")": "(",
    ">": "<",
    "]": "[",
}

rmatch = {
    "{": "}",
    "(": ")",
    "<": ">",
    "[": "]",
}

pts = {
    ")": 1,
    "]": 2,
    "}": 3,
    ">": 4,
}


def score(seq):
    score = 0
    for c in seq:
        score *= 5
        score += pts[c]
    return score


scores = []
for l in sys.stdin:
    mem = []
    corrupt = False
    for c in l.strip():
        if c in ["{", "(", "<", "["]:
            mem.append(c)
        elif c in ["}", ")", ">", "]"]:
            m = match[c]
            if mem.pop() != m:
                # this is an corrupt line, skip it!
                corrupt = True
                break
        else:
            raise Exception(f"Bad char: {c}")

    # Figure out and score the remaining chars!
    if not corrupt:
        mem.reverse()
        remaining = [rmatch[c] for c in mem]
        scores.append(score(remaining))

ss = sorted(scores)
print(ss[int(len(ss) / 2)])