Two Escondido girls who tortured, beat and stabbed another girl -- the perceived romantic rival of one of the defendants -- were each sentenced Thursday to more than 17 years in state prison.Karina Amador, 15, was sentenced to 18 years and four months behind bars by Vista Judge Runston Maino. The teenager pleaded guilty in July to attempted murder, assault with a deadly weapon and burglary charges.Jovana Gudino, also 15, was sentenced to 17 years and four months in prison. She pleaded guilty to attempted murder, burglary and trying to dissuade a witness."You guys might have thought you made us weaker, but really, I've learned in this tragedy that what can't kill us makes us stronger," the now 15-year-old victim told her attackers in court.Both girls, who were prosecuted as adults, admitted attacking the victim in her Escondido home on May 3, 2009. Authorities said Amador saw the victim -- a fellow eighth-grader -- as a romantic rival.At a hearing last December, Judge Theodore Weathers said Amador orchestrated and executed the plan to attack the 14-year-old victim in her own home."What they did to my daughter was horrific, monstrous, pure evil. And in her own home, where she is supposed to feel safe and secure," said the victim's mother.Weathers said Amador donned two layers of clothing, including a jacket with a hood to cover her face. He said the victim was attacked at her front door, pushed into the living room, then into her bedroom.The victim was cut and stabbed, then told to shower off the blood, authorities have said.Deputy District Attorney Rachel Solov said the victim was ambushed in her house. "She was drug from one room to another, she was beaten, she was stabbed, she was thrown in the shower. She literally was left there to die."After the attack, Amador burned her outer layer of clothing and threw it in a Dumpster, Weathers said. Later, the defendant showed Escondido police detectives how she tried to stab the victim's organs, the judge said.At another hearing this year, the victim testified that the defendants beat her in the head with her home phone, stabbed her five times in the back and carved her back.Both defendants offered an apology to the victim."My intention was not to kill her," said Amador. "I would like to make it clear that this was not over a boy. It was for something else, but that still doesn't give me the right to do what I did.""At the moment, it made so much sense to me. But now I look back, it makes no sense at all," added Gudino.