Replicate one Input Data to other while keypress

// Replicate Atendee 1 Name from First Name
    jQuery('li#field_3_1 .name_first input').bind('keypress keyup blur', function() {
        var firstName = jQuery(this).val();
        var lastName = jQuery('li#field_3_1 .name_last input').val();

        // to Atendee 1 Main Event
        jQuery('li#field_3_21 input').val(firstName + ' ' + lastName);

        // to Atendee 1 Second Event
        jQuery('li#field_3_30 input').val(firstName + ' ' + lastName);

        // to Atendee 1 Additional Event
        jQuery('li#field_3_43 tr.gfield_list_group:first-child input').val(firstName + ' ' + lastName);
    });