Case 1:  The zombie's final age is 20.
Case 2:  The zombie returns to the womb.
Case 3:  The zombie returns to the womb.
Case 4:  The zombie returns to the womb.
Case 5:  The zombie's final age is 82.
Case 6:  The zombie returns to the womb.
Case 7:  The zombie's final age is 0.
Case 8:  The zombie returns to the womb.
Case 9:  The zombie's final age is 56.
Case 10:  The zombie's final age is 72.
Case 11:  The zombie's final age is 70.