UTF8 symbols for subscript letters

I have been looking online for the UTF8 character table. And all I could find for subscripts were numbers 1 to 9 and some of latin letters.

I need to find S and B as subscripts for UTF8

Thanks for the help.

here is the link for a UTF8 character table: http://tlt.its.psu.edu/suggestions/international/bylanguage/mathchart.html