#include<iostream>
#include<vector>
#include<string>

using namespace std;

int main()
{
    string input;
    input.reserve(100000);

    while(!(cin >> input).eof())
    {
        ;
    }

    vector<int> output;
    output.reserve((input.length() / 3) + 1);

    int cnt = 0;
    int data = 0;
    string::reverse_iterator iter = input.rbegin();
    while(iter != input.rend())
    {
        if((*iter) == '1')
        {
            data += 1 << cnt;
        }


        if(cnt >= 2)
        {
            cnt = 0;
            output.push_back(data);
            data = 0;
        }
        else
        {
            ++cnt;
        }

        ++iter;
    }

    if(data != 0)
    {
        output.push_back(data);
    }

    vector<int>::reverse_iterator iter2 = output.rbegin();
    while(iter2 != output.rend())
    {
        cout << (*iter2);
        ++iter2;
    }

    cout << endl;
    output.clear();

    return 0;
}