n = input() if n == 'A' or n == 'a' : print("90~100") if n == 'B' or n == 'b' : print("80~89") if n == 'C' or n == 'c' : print("70~79") if n == 'D' or n == 'd' : print("60~69") if n == 'E' or n == 'e' : print("0~59")