Letter P
The letter P symbolizes a way to add the digits, if we have a number with two digits. To get another number.
In contrast to the letter T , which subtracts them.
An example:
For the number of two digits ... 25, we should add to the digit 2 the digit 5. Obtaining the new number 75. And so on. successively.
For the number ... 52, we should add to the digit 2 the digit 5. Obtaining the new number 57. And so on. successively.
