8 2 r aaabbbae bbbcccba cccdddcb dddeeedc eeeaaaed ........ ........ ........ r fgbgfhhb fgcgfhhc fgdgfhhd fgegfhhe fgagfhha ........ ........ ........ a aaaaaaaa bbbbbbba cccccbcb cccddcdb ddddddad ........ ........ ........