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VALHALLA, N.Y.  – A set of twin girls are beginning a new life after doctors successfully separated them in a 2-day-long surgery.

Ballanie and Bellenie were born connected at the base of their spines in the Dominican Republic. They were separated during a procedure that took 21 hours to complete at Maria Fareri Children’s Hospital in Valhalla, New York.

The 11-month-old girls will undergo physical therapy to help them adjust to the big change. Doctors say their prognosis for the future is bright.