how can i find all possible combinations
Can you be a bit more specific?
Give us an example like
a 1
b 2
c 3
x xa1 xa2 xa3 xb1 xb2 xb3 etc
y ya1 ya2 ya3 etc
z za1 etc
Is that your request? If yes, what do you want the n=8 and the r=3 to
represent?
Hans
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