14
EEEEEEEEEEEEEE
EAAAAADDDDDDDE
ENNDDDDBBBBBDE
ENNDBBBBCDDDDE
EDDDBFFFCDEEEE
EFFFBFGFCDDDDD
EFHHHFGFCCCCCD
EFFFFFGGIIIICD
IIIIIJJJIKKCCD
ILLLLJLLIMKCDD
ILNJJJLIIMKCDO
ILNNNLLIMMKCDO
ILLLLLIIMCCCDO
IIIIIIIMMCOOOO