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15    _ _ _ _ _ _ 13 _---1|      |13 _---1|    14\____/
14    ]-I-I-I-I-[  13 ---1|      | 13 ---1|    14|____|
14     \_______/       |     / \    |    | 7/^\14|
      7[8*7]14____|       ^    / ^ \   ^    | |8*14||
14      |______|      / \  /     \ / \   | 7===14|
1   ___14| 1___14  |1__   14/    /4=_=_=_=14\   \  |____|
14   1I15_1I15__1I15_1I15__1I15_1I  13(4====13(14_________13)14___| |____| ___
14   1\15-1\15--1|15-1|15--1/15-1/  14|_____I__7[ ]14__1I I15_1I15__14|1I15_1I15_14|_1I15_1I
14    |7[]14____|__14|   |_7[]14__|_______|  1\15-1\15--1|15-1|15--1/15-1/
14    |____|____|___|_____I_______I__|----------/
14   / \__7[]14_|__|_|-|_|-|-|_|-|_|-|__|_7[]14_7[]14___|
14  <4===14>__|____|10=-=-=-=-=-=-=-=-=-=-14|____|___/ \
14  ] 7[]14|____7[] 14||||||||||||||||||||||__|____<4===14>
14  ] 7[]14|__|____|/////////\\\\\\\\\\\|____|__|7[] 14[
14  <4===14>|___|__||||| 5|   |   | 14||||||__|_7[]14_<4===14>
14   \T/___|____||||| 5| 7O 5| 7O 5| 14||||||____|___\T/
14    |__|___|__||||| 5|   |   | 14||||||__|___|__|
14    \____|____|||||5 |___|___| 14||||||____|____/
12 ..................5/         \12...................
9 /////////////////5/           \9//////////////////