Zbyszek2 sampled WIF keys and performed analysis and proved in his post earlier, that it is impossible to see such a correlation in real WIF key.
In short - you discard blob on a weak assumption that it is not random. All the data is not random and should be thus discarded, don't you agree?
If the data were perfectly random you would not be able to read it into WIF key.
.....
Guys I would like to apologize for a mistake I made in my previews analysis.
I assumed that the private WIF key is random (private/public key pair was generated with a vanitygen like tool without modifications)
so my conclusion was that the "yellow/red", "green/blue" bit stream can not encode a private key.
Unfortunately my assumption might not nesesery be true,
in fact there only needs to be about length("FLAMEN6")*6bits= 7*6bits = 42bits random bits in a stream to generate a public key with "1FLAMEN6" prefix,
so not only the "yellow/red", "green/blue" stream may contain a valid private key, but also only the "short/long" stream is enough to create a valid private key with a "1FLAMEN6" prefix.
Even more, it's probably possible to modify the original vanitygen source code so, that the time it would take to find such a private key is the same as now (on my laptop the estimation is ~5 days). The only change would be to feed vanitygen not with random numbers but with a desired bit pattern + the 42 random bits.
If this is the case in this puzzle, you have to decide for yourself.