S 1 2t

S 1 2tS 1 2tS 1 2tS 1 2tS 1 2tS 1 2t
S 1 2tS 1 2tS 1 2tS 1 2tS 1 2tS 1 2t
S 1 2tS 1 2tS 1 2tS 1 2tS 1 2tS 1 2tS 1 2tS 1 2tS 1 2tS 1 2tS 1 2tS 1 2tS 1 2tS 1 2tS 1 2tS 1 2tS 1 2tS 1 2tS 1 2tS 1 2tS 1 2tS 1 2tS 1 2tS 1 2tS 1 2tS 1 2tS 1 2tS 1 2tS 1 2tS 1 2tS 1 2tS 1 2tS 1 2tS 1 2tS 1 2tS 1 2t