Given a string of characters, check whether it\'s possible to construct it from the symbols of the periodic table of elements.\n**Constraints:**\n* String can be empty but not null\n* Matching is case-insensitive\n* Symbols can be used more than once\n\n**Examples:**\n`Nag` can be constructed from `N` nitrogen and `Ag` silver\n`OH` can be constructed from `H` hydrogen and `O` oxygen\n`HJ` can not be constructed

Given a string of characters, check whether it\'s possible to construct it from the symbols of the periodic table of elements.\nConstraints:\n String can be emp