sentences:  In the alternate future, #17 and #18 are designed with the intention of killing Goku, who dies before they are released, and are portrayed as ruthless murderers who slaughter Earth's heroes and have a twenty-year reign over Earth.For a time, Gohan and Trunks remain the only ones who can combat the pair in battle, though Gohan is killed by #17, and after this, #17 and #18 are able to defeat Trunks with ease.Once he returns from the past, Trunks confronts the androids and easily defeats the pair, first terminating #18 and doing the same to #17.