How to get multiple files working with typescript

Greeter.ts

import {Student} from "./Student";

function greeter(student: Student) {
	return student.firstName + " " + student.lastName;
}

let user = new Student("Jane", "Doe");

document.body.innerHTML = greeter(user);

run.sh

npm install -g browserify
tsc --module commonjs FILE1.ts FILE2.ts
browserify MAINFILE.js -o bundle.js

Student.ts

export class Student {
	firstName: string;
	lastName: string;

	constructor(fname: string, lname: string) {
		this.firstName = fname;
		this.lastName = lname;
	}
}