function Main(input){
    input = input.split('\n');
    var arr_o = input[0].split('');
    var arr_e = input[1].split('');

    var arr_oc = [];
        for(var i = 0;i < arr_o.length; i++) {
            arr_oc.push(arr_o[i]);
            arr_oc.push(arr_e[i]);
        }

    console.log(arr_oc.join(''));
  }
Main(require("fs").readFileSync("/dev/stdin", "utf8"));