List all (█(8@4)) = 70 such codes.
* Take any particular code,for instance 10011100.This does not describe a valid mountain profile,since it begins with a downstroke; that does not matter.
* Add a 1 at the end to make a 9 – digit string 100111001.I call this an augmented code.
* Now concatenate by adding clones of this string to produce
100111001100111001100111001100111001………….