E5, A5, B3
We’ve already learned the first two; B3 is the new chord. Also, we will just write E, A, & B on our charts. This way we can play any type of E, A, or B Major chord [that we may already know], and come to understand that E5 can be our realization when we see the chord symbol E [likewise for others].
Also, B3 is not a conventional chord symbol. We are simply keeping in parallel with the logic of E5 and A5. The B3 = the B tone + its 3rd [D♯]. This also keeps tones on adjacent strings [we’ll cover B5 and more B’s later – any that you may know, including B7, will work – just as E or A will work for the E5 & A5].
We explore this type of numbering system in Chord Train.