Who inherits from me after my death, there being a wife, two daughters, and a mother?

The male heirs are fifteen, and the female heirs are ten. Whoever among them is alive at the time of death is an heir, and some of them exclude others. If a person dies leaving behind a mother, a wife, and two daughters, and no other heirs, then the wife gets one-eighth, the mother gets one-sixth, and the two daughters get two-thirds. The remainder is returned to the mother and the daughters.