HoRfSbMtInMcLvFlAcAmInMcAmTeErFmInHoLvDbRnMd

Note: put flag into AFFCTF{} format.

The text contains always an uppercase letter followed by a lowercase letter. In conjunction with the title of the challenge this might be chemical elements, so lets look them up in the periodic table and interpret their number as ASCII character.

flag: AFFCTF{Ch3m1strY_1s_4Dd1CtiVe}