def display(d):
 print '\n'.join([''.join(str(q) for q in p) for p in d])
 print '-----'
 
def tick(d):
 e = [x[:] for x in d]
 r=range(-4,4)
 for i in r:
  e[i]=list(e[i])
 for y in r:
  for x in r:
   c=[d[y-1][x-1],d[y-1][x],d[y-1][x+1],d[y][x-1],d[y][x+1],d[y+1][x-1],d[y+1][x],d[y+1][x+1]].count('■')
   if c<2 or c>3:
    e[y][x]='□'
   elif c==3:
    e[y][x]='■'
 d = e
 display(d)
 return d
 
d=[['□','□','□','□','□','□','□','□'],['□','□','■','□','□','□','□','□'],['□','□','□','■','□','□','□','□'],['□','■','■','■','□','□','□','□'],['□','□','□','□','□','□','□','□'],['□','□','□','□','□','□','□','□'],['□','□','□','□','□','□','□','□'],['□','□','□','□','□','□','□','□']]
 
for i in range(3):
 d = tick(d)

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