====== IPv6 ======

===== 풀이 =====
  * 그냥 시키는 대로 구현하기만 하면 되는 문제. 딱히 설명할 것이 없다.

===== 코드 =====
<dkpr py>
"""Solution code for "BOJ 3107. IPv6".

- Problem link: https://www.acmicpc.net/problem/3107
- Solution link: http://www.teferi.net/ps/problems/boj/3107
"""


def main():
    address = input()

    if '::' in address:
        l, r = address.split('::')
        l_nums, r_nums = l.split(':'), r.split(':')
        zeros = ['0'] * (8 - len(l_nums) - len(r_nums))
        nums = l_nums + zeros + r_nums
    else:
        nums = address.split(':')

    print(':'.join(f'{x:0>4}' for x in nums))


if __name__ == '__main__':
    main()
</dkpr>

{{tag>BOJ ps:problems:boj:골드_5}}