Competitions

# PP2. Week 4: March 29 - April 4

# Delete digits

One positive integer **n** is given. Remove from this number all digits **3** and **9**, leaving the order of other digits the same.

For example, the number **539013** will be transformed to **501**.

##### Input

One positive integer **n** (**1** ≤ **n** ≤ `10`

).^{18}

##### Output

Remove from the number **n** all digits **3** and **9**, keeping the relative order of other digits.

Input example #1

539013

Output example #1

501