#!/usr/bin/env python3

score = input("点数を入力して: ")
score = int(score)

if ((score >= 0) and (score <= 100)) :
    print("受理")
    if ((score >= 60) and (score < 70)) :
        print("可")
    elif ((score >= 70) and (score < 80)) :
        print("良")
    elif (score >= 80) :
        print("優")
    else :
        print("不可")
else:
    print("不受理")