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    AndyC said:
    blowdart said:

    Well if you either get head or tail, it's usually considered a pretty successful date overall.

    I cant make head or tail of it.. (sorry)

    Thanks for the replies guys. I agree the head/tail terms can be a bit confusing. The solution I implemented was as RoyalSchrubber suggests to just walk till you hit (n-4)th element. I have sent an email querying this as dont want them failing anyone else on this who bothers to read the question properly.