The court also jailed the convict's woman aide for seven years for abetting the crime.
The court refused to show any leniency to convicts Balram and Monika saying they gave refuge to innocent girls for forcing them into prostitution and they need to dealt with a "heavy hand" to root out this evil from the society.
The court also directed Chief Secretary of the Delhi government to pay a compensation of Rs 1.5 lakh to the victim "who has shown exemplary courage in conveying her plight".
"These kind of persons, who give refuge to the innocent girls from outside Delhi only with the intention to force them into prostitution and live upon their earnings need to be dealt with a very heavy hand so that a strong message is sent to all such persons indulging in this nefarious trade and to root out this evil from the society," Additional Sessions Judge Virender Bhat said.
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The court's judgement came while deciding the rape case in which out of the three, two girls turned hostile, leading to acquittal of two other accused, including a woman.
According to the prosecution, on May 7 last year, one of the three girls had met Arun Kumar and told him that she and two others had been raped by several men. The girl was taken to the police station where she said they had come here 10 days ago with Sunita in search of a good job.
Thereafter, Monika and Kishan took them to Balram, who also raped them in Dwarka area and threatened to kill them if they disclosed the incident to anyone, police said.