#CODE = #B041
num = int(input("Enter a number: ")) #100

#empty list to store octal numbers
octal_num = []

while num != 0:
    rem = num % 8
    octal_num.append(rem)
    num = num // 8

#reverse a list
octal_num = octal_num[::-1]

print("Octal of given number is ",end='')
for i in octal_num:
    print(i,end="") #144