def f(p):
 R=[]
 while p:
  c=[(x,y)for x,y in p if-1>sum(~-(X in p)for X in[(x,y+1),(x,y-1),(x+1,y),(x-1,y)])][0];r={c,*(F:=lambda x,y,X,Y:{V,*F(*V,X,Y)}if(V:=(x+X,y+Y))in p else{(x,y)})(*c,0,1),*F(*c,0,-1)};p-={*r};r=[r]
  while u:=1:
   for t,X in(0,1),(-1,-1):
    if len(K:=[V for x,y in r[t]if(V:=(x+X,y))in p])==len(r[0]):r=[[K]+r,r+[K]][abs(t)];p-={*K};u=0
   if u:R+=r,;break
 return R
 
import string
def viz(p):
	x,y=map(max,zip(*p))
	board = [[0 for _ in range(x+3)]for _ in range(y+3)]
	S = string.ascii_lowercase
	for i,r in enumerate(f(p)):
		for _r in r:
			for x,y in _r: board[x][y]=S[i]
 
	print('\n'.join([''.join(map(lambda x:str(x)if x else' ', u))for u in board]))
 
 
viz({(0,0),(1,0),(0,1),(1,1),(2,1),(1,2),(2,2)})
print('-'*50)
viz({(0,0),(0,1),(0,2),(0,3),(0,4),(0,5),(1,0),(1,1),(1,2),(1,3),(1,4),(1,5),(2,0),(2,1),(3,0),(3,1),(4,0),(4,1),(4,2),(4,3),(4,4),(4,5),(5,0),(5,1),(5,2),(5,3),(5,4),(5,5)})
print('-'*50)
viz({(0,0),(0,1),(0,2),(0,3),(0,4),(0,5),(0,6),(0,7),(0,8),(0,9),(1,0),(1,1),(1,2),(1,3),(1,4),(1,5),(1,6),(1,7),(1,8),(2,0),(2,1),(2,2),(2,3),(2,4),(2,5),(2,6),(2,7),(3,0),(3,1),(3,2),(3,3),(3,4),(3,5),(3,6),(4,0),(4,1),(4,2),(4,3),(4,4),(4,5),(5,0),(5,1),(5,2),(5,3),(5,4),(6,0),(6,1),(6,2),(6,3),(7,0),(7,1),(7,2),(8,0),(8,1),(9,0)})
print('-'*50)
viz({(0,0),(0,1),(0,2),(0,3),(0,4),(0,5),(0,6),(0,7),(0,8),(1,0),(1,1),(1,2),(1,3),(1,4),(1,5),(1,6),(1,7),(1,8),(1,9),(2,0),(2,1),(2,2),(2,3),(2,4),(2,5),(2,6),(2,7),(2,8),(2,9),(3,0),(3,1),(3,2),(3,4),(3,5),(3,6),(3,7),(3,8),(3,9),(4,0),(4,1),(4,2),(4,3),(4,4),(4,5),(4,6),(4,7),(4,8),(4,9),(5,0),(5,1),(5,2),(5,3),(5,4),(5,5),(5,7),(5,8),(5,9),(6,1),(6,2),(6,3),(6,5),(6,6),(6,7),(6,8),(6,9),(7,0),(7,1),(7,2),(7,3),(7,4),(7,5),(7,6),(7,7),(7,8),(7,9),(8,0),(8,1),(8,2),(8,3),(8,4),(8,5),(8,6),(8,7),(8,8),(8,9),(9,0),(9,1),(9,2),(9,3),(9,4),(9,5),(9,6),(9,7),(9,8),(9,9)})
print('-'*50)
viz({(0,0),(0,1),(0,2),(0,3),(0,4),(0,5),(0,6),(0,7),(0,8),(1,0),(1,1),(1,2),(1,3),(1,4),(1,6),(1,7),(1,8),(1,9),(2,1),(2,2),(2,3),(2,4),(2,5),(2,6),(2,7),(2,8),(2,9),(4,0),(4,1),(4,2),(4,4),(4,5),(4,6),(4,7),(4,8),(4,9),(5,0),(5,1),(5,2),(5,3),(5,4),(5,5),(5,6),(5,7),(5,8),(5,9),(6,0),(6,1),(6,2),(6,4),(6,5),(6,6),(6,7),(6,8),(6,9),(8,0),(8,1),(8,2),(8,3),(8,4),(8,5),(8,6),(8,7),(8,8),(8,9),(9,0),(9,1),(9,2),(9,3),(9,7),(9,8),(9,9),(10,0),(10,1),(10,2),(10,3),(10,4),(10,5),(10,6),(10,7),(10,8),(10,9)})
 

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