object Main extends App {
  val sc = new java.util.Scanner(System.in)
  val o, e = sc.next()
  val sb = new StringBuilder
  for (i <- 0 until o.length + e.length) {
    if (i % 2 == 0) {
      sb += o(i / 2)
    } else {
      sb += e(i / 2)
    }
  }
  println(sb.toString())
}
