input X
if (0 <= X and X < 49)
output "you fail"
else if (50 <= X and X < 70)
output "your grade is" X
output "you did OK"
else if (70 <= X and X < 85)
output "your grade is" X
output "you did well"
else if (85 <= X and X < 100)
output "your grade is" X
output "you did great"
endif
output "how did you do?"