import java.util.*

fun main(args: Array<String>) {
    abc058b()
}

fun abc058b() {
    val (o, e) = (1..2).map { ArrayDeque(readLine()!!.toMutableList()) }

    val answer = StringBuilder()
    while (o.isNotEmpty() || e.isNotEmpty()) {
        o.pollFirst()?.let { answer.append(it) }
        e.pollFirst()?.let { answer.append(it) }
    }

    println(answer)
}
