size=3
for i in range(1,size+1):
  print ("-"*(2*(size-i)),end="")
  s=chr(96+size)
  for j in range(1,i):
    s+=("-"+chr(96+size-j))
  s2= s[::-1]
  print (s+s2[1::],end="")
  print ("-"*(2*(size-i)))
   
for i in range(size-1,0,-1):
  print ("-"*(2*(size-i)),end="")
  s=chr(96+size)
  for j in range(1,i):
    s+=("-"+chr(96+size-j))
  s2= s[::-1]
  print (s+s2[1::],end="")
  print ("-"*(2*(size-i)))
   
