[ 2 ] 3 |-> 0 |-> 1 |-> 2 -1 |-> 0 -2 |-> 0 -3 |-> 2 f(z) = -1/6*z^3 + 7/6*z + 1 * [ 7 ] -2 |-> -5 |-> -9 |-> 7 9 |-> -5 -7 |-> -5 2 |-> 7 f(z) = -1/21*z^3 + 67/21*z + 1 * TOTAL: 2