score_list=[65,92,78,90,45,83,57,96]
score_dict={'high':[],'middle':[],'low':[]}
for score in score_list:
	if score>=90:
		score_dict['high'].append(score)
	elif score>=60:
		score_dict['middle'].append(score)
	else:
		score_dict['low'].append(score)
print(score_dict)