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Competitions

# 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 (1n1018).

##### Output

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

Time limit 1 second
Memory limit 128 MiB
Input example #1
539013

Output example #1
501