x_____________________________________________+
nn                                            |
o                                             |
n                                             |
                                              |
xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx            |
xxxxxxxxxxxxxxxxxxxxxxxxxx               .    |
xxxxxxxxxxxxxxxxxxxxxxxxxx                    |
xxxxxxxxxxxxxxxxxxxxxxxxxx                    |
xxxxxxxxxxxxxxxxxxxxxxxxxx                    |
xxxxxxxxxxxxxxxxxxxxxxxxxx   .           .    |
xxxxxxxxxxxxxxxxxxxxxxxxxx                    |
xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx  rrr  x
