from typing import Dict, List, Set
from copy import deepcopy
from itertools import combinations


def take_input() -> Dict[str, int]:

  names: List[str] = input().split(',')
  birthdates: List[int] = [int(i) for i in input().split(',')]

  return dict(zip(names, birthdates))


def reverse_dict(original: Dict[str, int]) -> Dict[int, Set[str]]:

  rev_dict: Dict[int, Set[str]] = {}

  for key, value in original.items():
    rev_dict.setdefault(value, set()).add(key)

  return rev_dict


def get_duplicates(rev_dict) -> List[Set[str]]:

  return [value for key, value in rev_dict.items() if len(value) > 1]


def main() -> None:

  birth_dict = deepcopy(take_input())
  rev_dict = deepcopy(reverse_dict(birth_dict))

  duplicates = deepcopy(get_duplicates(rev_dict))

  duplicates_sorted: str = ''

  for items in duplicates:

    items: List[str] = list(items)
    items.sort()

    if len(items) > 2:

      for c in combinations(items, 2):

        c: List[str] = list(c)
        c.sort()

        duplicates_sorted += ','.join(c) + '\n'

    else:
      duplicates_sorted += ','.join(items) + '\n'

  print(duplicates_sorted, end='')


if __name__ == '__main__':
  main()