fun main(args: Array<String>) {
    val o = readLine()!!
    val e = readLine()!!
    var s = o[0].toString()
    for (i in 0 until e.length) {
        s += e[i]
        try {
            s += o[i + 1]
        } catch (e: StringIndexOutOfBoundsException) {
        }
    }
    println(s)
}