S n + 1 = S n S n − 1 {\displaystyle S_{n+1}=S_{n}S_{n-1}} and S n − 1 S n {\displaystyle S_{n-1}S_{n}} differ only by their last two letters.
S n + 1 = S n S n − 1 {\displaystyle S_{n+1}=S_{n}S_{n-1}} и S n − 1 S n {\displaystyle S_{n-1}S_{n}} отличаются только в последних двух буквах.