PPP 
    PPPPPP▒
   ··PPPPP▒
  PPP··PPP▒
 ···PPP·PP▒
 PPP·PP·PP▒
 P·PP·PP·P▒
P·P·PP·P·P▒
·PPP·P·P<P▒
P·P·PP·P·P▒
 P·PP·PP·P▒
 PPP·PP·PP▒
 ···PPP·PP▒
  PPP··PPP▒
   ··PPPPP▒
    PPPPPP▒
       PPP