"use strict";

const fs = require("fs");

const [a, b] = fs.readFileSync(0).toString().trim().split("\n");
const result = [];
for (let i = 0, len = a.length; i < len; i++)
  result[i * 2] = a[i];
for (let i = 0, len = b.length; i < len; i++)
  result[i * 2 + 1] = b[i];
process.stdout.write(result.join("") + "\n");
