Hi all,

Suppose I have to letters  'u' and 'd'. Now I want to find all combinations like that :

uuuuuu
uuuuud
uuuudu
.........
........
dddddd

This type of combination generally required for Option Pricing in financial/derivative market. Here generally 'u' means: up-move and 'd' means down move of price like Stock price etc.

Is there any easy way in R for doing that? 

Regards,

       
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