Letter S
The letter S symbolizes a repetition of the digit in the linear jump of the count of the digits, when you reach the end of the number count.
Opposite to the letter Z that implies a jump in the count of the digit .
An example:
For the number of two digits ... 26, the second word, the third word, the fourth word, the fifth word and the sixth word will be selected (counting forward in masculine). And back (counting on the same digit back in feminine) the sixth word (again), the fifth word, the fourth word, the third word and the second word.
And so successively.
For the number ... 51, the fifth word, the fourth word, the third word, the second word and the first word will be selected (counting backwards in feminine). And back (counting on the same digit back in masculine) the first word (again), the second word, the third word, the fourth word and the fifth word. And so successively.
