Practicing Success
Select the combination of letters that when sequentially placed in the blanks of the given series will complete the series. r r p p s _ p _ s s r _ s s r _ _ p |
p r p p s s r r s p s s r p p s p r r p |
s p r r p |
r r p p s s / p p s s r r / s s r r p p s p r r p |