t step, separate the last digit of each number, ex 17 the digit seven is the last digit, then we have 4 patterns, each end or last digit will always be in two patterns, or high pair or low or odd pair low or odd high, there will always be a pair of patterns
hello, frank and others, very good this crossing filters of the 4 patterns, example = if I choose pair / high = we have 6.8 or that is just two options to play, very good filter !!! can be used
when choosing 3,4,5,6,7,8, ... if it fits on the base