#include <stdio.h>
#include <math.h>

int main() {
    int n, i = 0, s = 0;
    scanf("%d", &n);
    while (n > 0) {
        s += (int)pow(10, i) * ((n%10)%2==0? 0: 1);
        i++;
        n /= 10;
    }
    printf("%d", s);
    return 0;
}