Use of subscripts to denote Karvai

Any number written as a subscript denotes a Karvai for that duration. It has the same meaning as using parentheses, but is recommended to make it quicker to write. For example, $1_2 1,_2 1;_2$ denotes ``Tha (Thin,) Tha, (Thin,) Tha; (Thin,)''.