...... ...... ......▒ .......▒+▒▒▒▒▒ .............▒ ▒.........b..▒ ▒............▒ .........B...▒ ......rS.....▒ ...▒▒▒.......▒ . ▒..>....▒ ▒.......▒ ▒.......▒ ▒....▒▒▒▒▒ ▒▒▒▒▒▒