import java.util.Scanner

object Main extends App{
  val sc = new Scanner(System.in)
  val o = sc.nextLine()
  val e = sc.nextLine()

  var ans = ""
  for(i <- 1 to o.length){
    ans += o(i-1)
    if(i <= e.length){
      ans += e(i-1)
    }
  }
  println(ans)
}
