process.stdin.resume();
process.stdin.setEncoding('utf8');

var lines = [];
var reader = require('readline').createInterface({
  input: process.stdin,
  output: process.stdout
});
reader.on('line', (line) => {
  lines.push(line);
});
reader.on('close', () => {
    const a = lines[0].split("");
    const b = lines[1].split("");
    const ans = a.map((v, i)=>v+(b[i]||"")).join("");
    console.log(ans);
});
