What are the system sound ids for the new keyboard clicks in iOS 10?

General
I'm developing a third party keyboard and am currently trying to mimic the new keyboard clicks that Apple introduced in iOS 10b4.

Current Situation
The regular click sound can be played using AudioServicesPlaySystemSound(1104) but I can't seem to find the System Sound IDs for the two new other sounds. I've found the location of their .caf equivalents but those are way too loud to use, even after adjusting their volume using AVAudioPlayer.

Question
Is it possible to obtain the system sound ids of the new click sounds?

Extra
If anyone wants the .caf file paths for personal use, here they are:

/System/Library/Audio/UISounds/key_press_click.caf
/System/Library/Audio/UISounds/key_press_delete.caf
/System/Library/Audio/UISounds/key_press_modifier.caf

Solution

iOS 10.0 - iOS 11.0 b5

Press Click - ID: 1123

Press Delete - ID: 1155

Press Modifier - ID: 1156

Comment (1): Same IDs work for iOS 11 beta 5