i1

e2f2g2h2i2




d3e3f3g3i3k3l3m3




c4d4h4i4m4


b5c5d5i5
o5p5
a6b6c6o6p6q6

b7c7m7o7p7q7

b8c8i8j8n8o8p8q8r8s8

b9c9d9h9i9n9o9p9q9r9s9


c10d10e10I10J10K10L10M10N10O10P10Q10R10S10T10


c11d11e11f11g11h11i11j11k11l11m11n11p11q11r11




d12e12f12g12h12i12j12k12l12m12n12p12q12r12





E13f13g13h13i13
k13l13m13n13o13p13q13







f14g14h14i14


m14n14o14p14q14






h15i15




q15