Word referring to all letters with the long ē sound [closed]

I have found two sources that simply refer to these letters collectively as the "E-set":

Two sets of letters were tested, the highly confusible E-set, {B C D E G T P V Z}, and the full 26 letters.

—"Speech Recognition using SVMs," Nathan Smith and Mark Gales, in Advances in Neural Information Processing Systems 14, edited by Thomas Glen Dietterich, Suzanna Becker, Zoubin Ghahramani

In the case of discriminating between minimal pairs, such as those in the E-set vocabulary, (the letters {BCDEGTPVZ})...

—"HMM Speech Recognition with Neural Net Discrimination," by William Y. Huang and Richard P. Lippmann

(Bolding added)

Try using a different search term. Definitions are not what you want.

You'll find several links if you use the search term "spelling English letters."

If you use the term "phonetic spelling English letters" you will get several hits that use the IPA.