async function *foo() {        // async === Identifier ################
                               // function === Keyword
  var a;                       // var === Keyword
  let b;                       // let === Keyword
  const c = {                  // const === Keyword
    get d() {},                // get === Identifier ################
    set e(val) {},             // set === Identifier ################
  }
  await f;                     // await === Identifier ################
  yield g;                     // yield === Keyword
  typeof x;                    // typeof === Keyword
  a in x;                      // in === Keyword
}

class H {                      // class === Keyword
  static i() {}                // static === Keyword
}

if (true) {} else {}           // if === Keyword
                               // else === Keyword 
try {} catch {} finally {}     // try === Keyword
                               // catch === Keyword
                               // finally === Keyword
for (;;) {}                    // for === Keyword
do { } while (true);           // do === Keyword
                               // while === Keyword
for (let x of y) {}            // for === Keyword
                               // of === Identifier ################