#include<iostream>
using namespace std;
int main()
{
    string a;
    int b=0;
    cin>>a;
    for(int i=0;i<a.size();i++){
        if((a[i]-'0')%2==0)b=b*10;
        else {b=b*10;b=b+1;}
    }
    cout<<b;
    return 0;
}