4-level stack manipulation on 12c

[PANAMATIK]

(03-02-2015 03:18 AM)Don Shepherd Wrote:  If my 4-level stack on my 12c contains:

t - don't care
z - don't care
y - 17
x - 5

and I want it to contain:

t - 17
z - 5
y - 17
x - 5

is there an elegant way to achieve that using only ENTER, roll down, and x<->y?

Code:

 t z x x y x z z x y y
 z y z z x y x x x x x
 y x y x z x y x y x y
 x x x y x z x y y y x

Perhaps not the fastest approach, but it was asked to be elegant!
Bernhard