[ -4 10 ] [ -10 6 ] 
-6 |-> 12 |-> 6
2 |-> -4
-2 |-> 6
-12 |-> -4
f(z) = 1/48*z^3 - 31/12*z + 1
*
[ -10/7 12/7 ] [ 2/7 10/7 ] 
-2/7 |-> 4/7 |-> 12/7
6/7 |-> 12/7
-4/7 |-> 2/7
-6/7 |-> 2/7
f(z) = -49/48*z^3 + 19/12*z + 1
*
TOTAL: 2