c ccc ccccccccc ccc

vvvvvvvvvv o bnnnnnnnnnnnD nnnnnnnnnnnbD
vvvvvvvvvv o bnnnnnnnnnnnD nnnnnnnnnnnbD
BBBBBBBbddddddddddD ddddddddddb

vvvvvvvvvvv o bnnnnnnnnnnnD nnnnnnnnnnnbD
vvvvvvvvvvv o bnnnnnnnnnnnD nnnnnnnnnnnbD
BBBBBBBbdddddddddddD dddddddddddb
