let foo1;
var foo2;
let foo3 = "foo";
var foo4 = "bar";
const foo5 = "foo";
let foo6,
  bar1 = "bar";
var foo7,
  bar2 = "bar";
let foo8 = "foo",
  bar3 = "bar";
var foo9 = "foo",
  bar4 = "bar";
const foo10 = "foo",
  bar5 = "bar";
var a = {
    a: 1,
    b: 2,
    c: 3
  },
  b = {
    a: 1,
    b: 2,
    c: 3
  };