The reason is because it is a system that uses letters called chemical symbols, which are a shortned way of writing the names of elements.
The cast of Du skall hedra - 1995 includes: Jessica Liedberg as Stora Systern Lena Lindblom as Kristine Josefine Roth as Agnes
Jessica Liedberg has: Played Stina in "Rederiet" in 1992. Played Daughter in "Vi ses i Krakow" in 1992. Played Natasja Videkov in "Snoken" in 1993. Played Kia in "Happy Days" in 1995. Played Stora Systern in "Du skall hedra" in 1995. Played Agneta in "S:t Mikael" in 1998. Played Anna in "Tillsammans" in 2000. Played Linn in "Solsidan" in 2010. Played Tina in "Kontoret" in 2012. Played Klara Lambert in "Skumtimmen" in 2013.