S 2t 2

S 2t 2S 2t 2S 2t 2S 2t 2S 2t 2S 2t 2
S 2t 2S 2t 2S 2t 2S 2t 2S 2t 2S 2t 2
S 2t 2S 2t 2S 2t 2S 2t 2S 2t 2S 2t 2S 2t 2S 2t 2S 2t 2S 2t 2S 2t 2S 2t 2S 2t 2S 2t 2S 2t 2S 2t 2S 2t 2S 2t 2S 2t 2S 2t 2S 2t 2S 2t 2S 2t 2S 2t 2S 2t 2S 2t 2S 2t 2S 2t 2S 2t 2S 2t 2S 2t 2S 2t 2S 2t 2S 2t 2S 2t 2S 2t 2