function Main(input) {
  input = input.split("\n")
  E = input[0]
  O = input[1]
  var result = ""
  for(var i=0; i < E.length; i++) {
    result += E[i]
    if(i < O.length ) result += O[i]
  }
  console.log(result)
}

Main(require("fs").readFileSync("/dev/stdin", "utf8"));