ff = open('../words.txt', 'r')
ww = ff.readline()
ff.close()

longest = 0
dic = {}
lisw = ww.split(',')
for i in lisw:
  i = i[1:-1]
  if len(i) > 2:
    tmp = '.'.join(i).split('.')
    tmp = ''.join(sorted(tmp))
    if tmp in dic.keys():
      dic.get(tmp).append(i)
    else:
      dic.update({tmp:[i]})


move = []

dicmove = {}

def howtomove(a, b):
  tmp = ''
  for i in a:
    tmp += str(b.index(i))
  if dicmove.has_key(tmp):
    dicmove.get(tmp).append([a, b])
  else:
    dicmove.update({tmp:[[a, b]]})
  return tmp

def howtolis(lis):
  out = set([])
  for i in lis:
    for j in lis:
      if i != j:
        tmp = howtomove(i, j)
        out.add(tmp)
  return list(out)

words = []


for i in dic.keys():
  if len(dic.get(i)) > 1:
    wordlen = len(i)
    while len(move) - 1 < wordlen:
      move.append([])
      words.append([])
    move[wordlen].extend(howtolis(dic.get(i)))
    words[wordlen].extend(dic.get(i))

#print words
#print move

def movenum(num, mm):
  out = ''
  num = str(num)
  for i in xrange(len(mm)):
    try:
      out += num[int(mm[i])]
    except IndexError:
      return 3
  return int(out)


def issq(x):
  tmp = int(x ** 0.5)
  if tmp ** 2 == x:
    return True
  return False

result = []
length = len(move[-1][0])
#print length
n = int((10 ** length) ** 0.5)
while length > 1 and n > 0:
  sq = n ** 2
  length = len(str(sq))
  while len(move[length]) <= 0:
    length -= 1
    n = int((10 ** length) ** 0.5)
  for moveit in move[length]:
    newsq = movenum(sq, moveit)
    if len(str(sq)) == len(str(newsq)):
      if issq(newsq):
        #print sq, newsq
        result.append([sq, dicmove.get(moveit)[0][0]])
        #if len(str(result[-1])) != len(str(result[0])):
          #break
  n -= 1

#print result

for item in result:
  nums = str(item[0])
  dicju1 = {}
  dicju2 = {}
  for i in xrange(len(item[1])):
    numm = nums[i]
    chh = item[1][i]
    if numm in dicju1.keys():
      if chh != dicju1.get(numm):
        break
    else:
      dicju1.update({numm:chh})
    if chh in dicju2.keys():
      if numm != dicju2.get(numm):
        break
    else:
      dicju2.update({chh:numm})
  else:
    print nums
    quit()