month_names = ["January", "February", "March",
               "April", "May", "June", "July",
               "August", "September", "October",
               "November", "December"]

month_lengths = [31, 28, 31, 30, 31, 30,
                 31, 31, 30, 31, 30, 31]

for i in range(0, 12):
    print(month_names[i]+ ":", month_lengths[i], "days")