I dont know what you mean with "P" (do you mean 'T'=Tonika?) but if those numbers should stand for oktaves, here are some rules to become understandable in the world:
Capital letters (majuskels) stand for chords, small letters (minuscels) for tones:
- C7: dominant-septchord that is based on tone c: c-e-g-b♭
- c7: the tone c in the seventh octave, starting with sub-contra = octave 0.
Here are some rules. If you get the system, all becomes pretty simple.
- In chord notation, every number above 6 stands for tones that you add, every number blow for tones that substitute.
- Add m to the basetone, if you want a minor third
- Add ° or 0, if you want 2 stacked small terces, c - e♭ - g♭
- Add +, if you want two stacked big terces, c - e - g♯
- 5 stands for chords without a third (powerchord)
- 3 and 3- stand forn chords without a quint
- 4 and 2 substitue the third.
- 6 substitutes the 5
- 7 is a small one.
- Add Δ to the base, if you want a major sept. You may write j7 if you dont find the letter delta in your charmap.
So E♭Δ9 stands for e♭ - g - b♭ - d - f
If you want to invert, just write down the bass-tone (captial letter because it is part of a chord) after a slash:
- E♭Δ9/G : first inversion
- E♭Δ9/B♭ : second inversion
- E♭Δ9/D : third inversion
- E♭Δ9/F : forth inversion
The seventh (sept) has some specials that depend on how you use the system and are not universally agreed.
A 07 should be a diminished chord with the added minor seventh: c - e♭ - g♭ - b♭, that chord is called a half-diminished chord.
A ø denotes a fully diminished chord (c - e♭ - g♭ - b♭♭) which has a diminished sept (♭7): It 'goes thru the system', because you can invert it as you like as 3 minor terces have the surrounding interval of an octave, so effectively there are just 3 fully diminished chords in total, each with 4 equally sounding inversions. Sadly, as ø looks like something that is half cut thru, it became misunderstood as the half-diminished chord, with should be 07=0+7. So if you see 07 or ø, you have to make an educated guess;)