1 is the _______ of 2.
predecessor
6 is the ______ of 5.
successor
7 is the _______ of 8.
predecessor
12 is the _______ of 11.
successor
9 is the _______ of 8.
successor
3 is the ________ of 2.
successor
10 is the _______ of 11.
predecessor
4 is the ______ of 5.
predecessor