Lesson 19: U subscript 1919 (2/8)
Click every "U subscript 1919" sign below, then press submit or type 's'.
Click every "U subscript 1919" sign, then press submit or type 's'.
Click every "U subscript 1919" sign below, then press submit or type 's'.
Click every "U subscript 1919" sign, then press submit or type 's'.