Next in sequence please. Required for Charity Comp.?

Question

Next in sequence please.

B.C.N.O. ........ A.E.F.H.I. ....... M.V.E.M. ..........

U.D.T.Q. ........ A.H.I.M.O. ......... T.T.F.S.E. .........

E.I.S.H. ........

Many thanks. I have 100 of these to answer. All proceeds go to charity. Thanks everyone.

Answer 1

B.C.N.O .......  F (periodic elements boron, carbon, nitrogen, oxygen, FLOURINE)

A.E.F.H.I. .......  M (in alphabetical order, letters with only straight lines)

M.V.E.M. ..........J (Mercury Venus Earth Mars JUPITER)

U.D.T.Q. ........ C (uno dos tres quatro CINCO)

A.H.I.M.O. ......... T (in alphabetical order, letters that look the same when viewed in a mirror)

T.T.F.S.E. ......... T (ten twelve fourteen sixteen eighteen TWENTY)

E.I.S.H. ........