bbb bbc bbk bbl bcb bcc bck bcl bkb bkc bkk bkl blb blc blk bll c-- cbb cbc cbk cbl ccb ccc cck ccl ckb ckc cl- clb clc clk cll kbb kbc kbk kbl kcb kcc kck kcl kkb kkc kkk kkl kl- klb klc lbb lbc lbk lbl lcb lcc lck lcl lkb lkl llb llc llk lll

bbbb bblb bcbc bccc bccl blkb cbbc cbcc cbcl cblb cblc ccbc cccb cccc cccl cclc ckbc ckck ckcl kbbb kbbc kbbk kbbl kbcb kbck kbcl kbkb kbkk kbkl kblb kbll kcbc kcbk kcbl kccb kccc kcck kccl kckc kckk kckl kclc kclk kcll kkbb kkbl kkcb kkck kkcl kkkk kklb kklc kkll klbb klbc klbl klcb klcc klck klcl klkc klkk klkl kllb kllc kllk lbcc lcbc lccc llcc lllc llll

ccccc

bbbbbb

bbbbbbb

bbbbbbbb

bbbbbbbbbbbbbbb ccccccccccccccc