[51] b a c f d g b k
[52] a b c d
[53] a n a b c d c k f g g g h m m i
[54] a b c
[Figure 55]
[56] a a b
[57] b c c c c c c d
[58] a b c c
[59] a b c c b c
[60] a a b
[61] d b a c bb a d d a c c d d
[62] a a a c b a a a
[63] c b e d
[64] a b c
[65] a b c d
[66] a b
[67] c b a
[68] d a c c b c c
[69] a c c b c c
[70] c a c b
[71] a b c
[72] a b c
[73] a a a a a a c ab e d b ef h g h f
[74] a a a a a a a bd c de eg g f g gh hk i kl m
[75] g f e d c a a a i h a a g f e d b s
[76] a a b b b b b b b c d d e f g g
[77] b b c c b b a b b c c b b
[78] a b c d
[Figure 79]
[Figure 80]