In January of 2020, additional combinations of letters and numbers were added to the blacklist in Berlin: B-HH 18, B-HH 28, B-HH 8818, B-HH 1888, B-HH 1828, B-HH 1933, B-SH 18, B-SH 8818, B-SH 28 and B-SH 1888. The combinations are popular identifiers among right-wing extremists. "HH" means "Heil Hitler", "SH" stands for "Sieg Heil", "18", "88" and "28" refer to numbers in the alphabet and mean "Adolf Hitler", "Heil Hitler" and "Blood and Honour". "1933" stands for the year the National Socialists seized power in Germany.