#include <iostream>
#include <sstream>
#include <string>

using namespace std;

int main()
{
    string s;
    while(1){
        cin >> s;
        if(s=="END")
                break;
        for(int i=s.size()-1;i>=0;--i){
            if(s[i]=='0')
                continue;
            s[i] = static_cast<char>(static_cast<int>(s[i])-1);
            break;
        }
        stringstream ss(s);
        int sn = 0;
        ss >> sn;
        cout << sn << endl;
    }

    return 0;
}