For example, Hydrogen contains H (hydrogen), Y (yttrium), O (oxygen), N (nitrogen), Ge (germanium), and Og (oganesson).
Hydrogen: H, Y, O, N, Ge, Og
Helium: H, He, Li, I, U
Lithium H, Li, Th, I, U
Beryllium B, Be, Y, Er, Li, U, I
Boron B, O, N
Carbon C, O, N, Ca, Rb, B
Nitrogen N, I, O, Ni, Og, Ge
Oxygen O, Y, N, Ge
Fluorine F, U, O, I, N, Fl, Ne, In, Lu
Neon N, O, Ne
Total: 20 symbols