          BBB
       BBBBBBBBB
     BBBBBBBBBBBBBBB
   BBBBBBBBBBBBBBBBBBBB
   BBBBBBBBBBB         BBB
  BBBBBBBB${c2}YYYYY
${c1}  BBBBBBBB${c2}YYYYYY
${c1}  BBBBBBBB${c2}YYYYYYY
${c1}  BBBBBBBBB${c2}YYYYY${c3}W
${c4} GG${c1}BBBBBBBY${c2}YYYY${c3}WWW
${c4} GGG${c1}BBBBBBB${c2}YY${c3}WWWWWWWW
${c4} GGGGGG${c1}BBBBBB${c3}WWWWWWWW
${c4} GGGGGGGG${c1}BBBB${c3}WWWWWWWW
${c4}GGGGGGGGGGG${c1}BBB${c3}WWWWWWW
${c4}GGGGGGGGGGGGG${c1}B${c3}WWWWWW
${c4}GGGGGGGG${c3}WWWWWWWWWWW
${c4}GG${c3}WWWWWWWWWWWWWWWW
 WWWWWWWWWWWWWWWW
      WWWWWWWWWW
          WWW