E Q R Q T O W Y T E T I O U O E W E

The title is the key, a sequence of greek letters that skips pi.

The letters are a substitution code for the digits of pi.

E.QRQTOWYTETIOUOEWE
3.14159265358979323846264338327950288  (which is as far as I can remember)

So the next 5 numbers are 84626  which is  IRYWY