다음 파이썬 프로그램의 출력 결과는?

student_list = ['A', 'B', 'C', 'D'] student_score = ['92', '85', '77', '54'] student_grade = [] i = 0 for _ in range(len(student_score)): try: if student_score[_] >= 90: student_grade.append('A+') i += 1 elif student_score[_] >= 80: student_grade.append('B+') i += 1 elif student_score[_] >= 70: student_grade.append('C+') i += 1 else: student_grade.append('D+') i += 1 except: student_grade.append('F') print('%s, %s' % (student_list[i], student_grade[i]))