In 2000, the cast was expanded further and the sets changed once again. Newcomers to the puppet cast were Feli Filu (2000–2007), the monster reporter, the comic duo Pferd the horse (2002–present) and Wolle the sheep (2002–present), as well as a few recurring grouches, and some Anything Muppets. In 2005, after a 27-year presence on the show, Tiffy was replaced with single mom Moni (2005–2007) and her pink and furry daughter Lena (2005–2009). Since then, "Sesamstraße" has been visited by the most diverse cast of supporting Muppets than any other international version of "Sesame Street". One-shot characters include Super Franky, Grouchella, Knut Köffelström, Turbo Theo, as well as various wolves, dogs and other creatures. In 2006, German audience's long-time favorites Ernie and Bert began appearing regularly in newly produced German segments. For the 36th season, the two moved into their own apartment on "Sesamstraße", above new human character Frau Kowalski, commenting on the street events from their balcony. As more and more previously used Muppets were borrowed from Sesame Workshop, more secondary characters evolved in their own sketches, such as the green Wolf vom Wörtersee in 2007.