/* 
 * File:   owl.cpp
 * Author: cteam032
 *
 * Created on October 24, 2015, 11:12 AM
 */

#include <cstdlib>
#include <iostream>
using namespace std;

/*
 * 
 */
int main(int argc, char** argv) {

    string number;
    
    while(cin >> number){
        if(number == "END") return 0;
        int len = number.length() - 1;
        
        
        for(int i = len; i >= 0; i--){
            if(number[i] != '0'){
                number[i]--;
                if(i == 0){
                    if(number[i] == '0'){
                      number.clear();
                      number = "0";
                    }
                }
                break;
            }
        }
        
        cout << number << endl;
    }
    
    return 0;
}