CF644C.Hostname Aliases

The first line of the input contains a single integer $n$ ( $1<=n<=100000$ ) — the number of page queries. Then follow $n$ lines each containing exactly one address. Each address is of the form http://[/], where:

• consists of lowercase English letters and dots, there are no two consecutive dots, doesn't start or finish with a dot. The length of is positive and doesn't exceed $20$ .
• consists of lowercase English letters, dots and slashes. There are no two consecutive slashes, doesn't start with a slash and its length doesn't exceed $20$ .

Addresses are not guaranteed to be distinct.

First print $k$ — the number of groups of server names that correspond to one website. You should count only groups of size greater than one.

Next $k$ lines should contain the description of groups, one group per line. For each group print all server names separated by a single space. You are allowed to print both groups and names inside any group in arbitrary order.

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