
object Main extends App {
  
  val sc = new java.util.Scanner(System.in)
  val o, e = sc.next()
  if (o.length == e.length) {
    o.zip(e).foreach(x => print(x._1.toString + x._2.toString))
  } else {
    o.zip(e).foreach(x => print(x._1.toString + x._2.toString))
    println(o.last)
  }
}
  