mysql query to show the recommended friends

Hi,

I am looking for someone who can help me to get the record of recommended friends only.

Account id: zb_6274a0cf40b57 has two friends:
1. zb_627807cd88aa5 -> has one friend zb_626f4bd980a02
2. zb_626caebb01760 -> has two friends: zb_626231ed3ab48 and zb_6274a0cf40b57

Result:
Shows two records:
zb_626231ed3ab48 and zb_626f4bd980a02