I just got a WA#5 on this problem. I've checked everything, can't understand what is wrong. Can anybody give me some tests or hints?

If you got WA5 try this test case:
Test :

1
Adham
<blog>
<friend>Siroj</friend>
<friend>Agabek</friend>
</blog>

Answer :

Adham
1: Agabek, Siroj
2:
3: