object Main extends App {
	var odd = io.StdIn.readLine.toList
	var even = io.StdIn.readLine.toList

	val z = even.size;

	var list: List[Char] = List()

	for(i <- 0 until z){
		list = list :+ odd.head
		list = list :+ even.head
		odd = odd.drop(1)
		even = even.drop(1)
	}

	if(odd.size != z) list = list :+ odd.head

	println(list.mkString)


}