import io.Source.stdin
import scala.collection.mutable.Stack

object cycle {
  def main(args: Array[String]): Unit = {
    val strings = stdin.getLines().toList
    val correct = strings
      .map { x => balance_stack(x.toList, new Stack[Char]) }
      .map { if(_) '1' else '0' }
      .toString()
    print(Integer.parseInt(correct, 2))
  }

  def balance_stack(chars: List[Char], stack: Stack[Char]): Boolean = {
    if(chars.isEmpty) stack.isEmpty
    else {
      chars.head match {
        case '(' | '[' | '{' => { stack.push(chars.head); balance_stack(chars.tail, stack) }
        case _ => {
          val top = stack.pop()
          chars.head match {
            case ')' => { if(top == '(') balance_stack(chars.tail, stack) else false }
            case '}' => { if(top == '{') balance_stack(chars.tail, stack) else false }
            case ']' => { if(top == '[') balance_stack(chars.tail, stack) else false }
          }
        }
      }
    }
  }
}