import scala.annotation.tailrec
import scala.io.StdIn.*


def isPrime(value: Long): Boolean =
  @tailrec def isPrimeInner(p: Long): Boolean =
    if p * p > value then
      true
    else
      value % p != 0 && isPrimeInner(p + 1)
  if value <= 2 then
    value == 2
  else
    isPrimeInner(2)

def countExpression(digits: List[Int])(predicate: Long => Boolean): Int =
  def enumerate(rest: List[Int], confirmed: Long = 0, last: Long = 0): Int =
    rest match
      case Nil => if predicate(confirmed + last) then 1 else 0
      case h::Nil => enumerate(Nil, confirmed, last * 10 + h)
      case h::t => enumerate(t, confirmed, last * 10 + h) + enumerate(t, confirmed + last * 10 + h, 0)
  enumerate(digits)

@main def main =
  val expr = readLine().map(_.asDigit).toList
  val result = countExpression(expr){isPrime}
  println(result)