S t t2 t

S t t2 tS t t2 tS t t2 tS t t2 tS t t2 tS t t2 t
S t t2 tS t t2 tS t t2 tS t t2 tS t t2 tS t t2 t
S t t2 tS t t2 tS t t2 tS t t2 tS t t2 tS t t2 tS t t2 tS t t2 tS t t2 tS t t2 tS t t2 tS t t2 tS t t2 tS t t2 tS t t2 tS t t2 tS t t2 tS t t2 tS t t2 tS t t2 tS t t2 tS t t2 tS t t2 tS t t2 tS t t2 tS t t2 tS t t2 tS t t2 tS t t2 tS t t2 tS t t2 tS t t2 tS t t2 tS t t2 tS t t2 tS t t2 t