Lesson 20: DU subscript 1010 (2/8)
Click every "DU subscript 1010" sign below, then press submit or type 's'.
Click every "DU subscript 1010" sign, then press submit or type 's'.
Click every "DU subscript 1010" sign below, then press submit or type 's'.
Click every "DU subscript 1010" sign, then press submit or type 's'.