back back back back back back | r

back back back back back back | e

back back back back back back | s

back back back back back back | p

back back back back back back | o

back back back back back back | n

back back back back back back | b

back back back back back back | a

back back back back back back | c

back back back back back back | k

back back back back back back | resback

back back back back back back | resback