#include <stdio.h>

int count = 0;
int i = 0;
int fact(int n)
{
    if (n)
    {
        int a = n % 10;
        int b = a % 2;
        
        return 10 * fact(n / 10) + b;
    }
    return 0;

}

int main(void)
{
    int n = 0;
    scanf("%d",&n);
    int ret = fact(n);
    printf("%d\n",ret);
    return 0;
}