fun main(args: Array<String>) {
    val (o, e) = (1..2).map { readLine()!! }
    var marged = arrayOfNulls<Char>(o.length + e.length)
    for (i in 0 until o.length + e.length) {
        if (i % 2 == 0) {
            marged[i] = o.toCharArray()[i/2]
        } else {
            marged[i] = e.toCharArray()[i/2]
        }
    }
    println(marged.joinToString(""))
}