let calls = "";

function jerry(str) {
  kramer('Jerry');
}

function george(str) {
	calls = str + 'George';
  elaine(calls);
}

function elaine(str) {
  calls = str + 'Elaine';
}

function kramer(str) {
  calls = str + 'Kramer';
  george(calls)
}



// should return: 'JerryKramerGeorgeElaine'
calls = jerry(calls);
console.log(calls);