const object1 = {
a: 1,
b: 2,
c: 3
};
const object3= {
g: 1,
h: 2,
i: 3
};
const object2 = Object.assign({c: 4, d: 5}, object1);
const object4 = Object.assign({g: 34, h: 25}, object3);
console.log(object2.c, object2.d);
console.log(object4.g, object4.h);