Hi every body.

Please  check few problems  if they  are  correct or not.

1) 1234:1234:1234:1234:0:0:0:0

1234:1234:1234:1234::

2) 0:0:0:0: 1234:1234:1234:1234

:: 1234:1234:1234:1234

3) 1234:0:1234:1234:1234:1234:1234:1234

1234::1234;1234:1234:1234:1234:1234

4)1234:0:1234:1234:0:1234:1234:0:

1234::1234:1234:0:1234:1234:0

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thanks and have a nice week.