Reverse Engineering: Which of the following sequences of inputs would give the output 'C' 'A' 'D' 'B' over multiple iterations?

Given the code below, the output obtained in several runs is 'C' 'A' 'D' 'B'.
if score >= 90:
   print('A')
elif score >=80:
   print('B')
elif score >= 70:
   print('C')
elif score >= 60:
   print('D')
else:
   print('F')