Multiline strings

In JavaScript, strings created with single or double quotes do not allow line wrapping. It means, the following won't work:

let str = 'abc
def'; // that won't work

This also won't work:

let str = "abc
def"; // that won't work

But the backticks are especially designed to create multiline strings:

let str = `abc
def`; // this will work

Write the string, consisting of characters 'a', 'b', 'c', to the variable str. There should be a line wrapping after each character, except the last one.