Friends of friends with MapReduce

[Praveen Bathala]

Hi,

I am trying to write a MapReduce code to find friends of friends in a social 
network with MapReduce.
my data snippet :

1       41
1       7
1       100
2       64
2       65
2       42
2       86
3       54
3       24
3       16
3       43
4       39
4       52

Here map() goes through line by line, now I get "41" as friend to "1" and I 
want to go to all "41"'s to get his friends. how can I do that.
Can I jump to any line I need in Mapper class?

Please, Help me with this...

Thanks in advance
+ Praveen