fun main(args: Array<String>) {
    val (o, e) = (1..2).map { readLine()!! }
    val result = (0 until o.length + e.length).map {
        if (it % 2 == 0) {
            o[it/2]
        } else {
            e[it/2]
        }
    }.joinToString("")
    println(result)
}