Displaing woocommerce atributes with changed value – what function?

Hello everyone,
I am using following function to display one of woo-commerce attribute:

function get_level () {
		$level= get_the_terms( $product->id, 'pa_level');

      foreach ( $level as $level) {
       echo  $level->name . ' ';
        }

	}

This code is allowing me to display all value of this attribute, one after each other. But problem is that the value of this attribute in the place where I wanna display it is too long. What function do I have to use to change displayed value for shorter.
For example
If value of 1st attribute is “Level 1” display it as a “L1”
2st “Level 2” show as “L2”
etc..