┌────┬──┐                                       
                               │····│··└───┐                                   
                            ┌──┘··%·│··%···│                                   
                            │······)·······├───┬─┐                             
                            │·····───┐·│·│·π···+·│                             
                            └┐·┌─┐···│·│·│·│··%├─┤                             
                             │·│·│·│···│·│·π··/+·│                          &