fun main(args: Array<String>) = yorukatsu11a()

fun yorukatsu11a() {
    val o = readLine()!!
    val e = readLine()!!

    val sb = StringBuilder()

    for (i in o.indices) {
        sb.append(o[i])
        if (i in e.indices) sb.append(e[i])
    }

    val answer = sb.toString()

    println(answer)
}
