def main():
    num1 = int(input("Enter starting number of the range: "))
    num2 = int(input("Enter ending number of the range: "))
    counter = 0
    longestCycle = 0
    lcNum = 0
    temp = 0
    for i in range(num1,num2 + 1):
        temp = i
        while i > 1:
            if i % 2 == 0:
                i = i / 2
            elif i % 2 == 1:
                i = 3 * i + 1
            counter += 1
        if counter >= longestCycle:
            longestCycle = counter
            lcNum = temp
        counter = 0
    print("The number", str(lcNum), "has the longest cycle length of", str(longestCycle))
main()