Four teens beat and stabbed a 19-year-old June 7 at 9:20 a.m., in front of 2230 Broadway, at the corner of West 80th Street. The victim, a 19-year-old man, reported to police that the four teenagers attacked him after an earlier incident involving the group and a friend. The victim, who lives on the Upper West Side, told cops that one of the four attackers struck him on the left side of his head with an object. He was also stabbed on the left side of his lower back and right arm. A knife was found on the scene, according to cops. David Vicente, 18, was arrested and charged in connection with the attack.