#include <iostream>
#include <string>

using namespace std;

int main(){
    string s;
    while(true){
        getline(cin,s);
        if(s == "END")return 0;
        for(int i=s.length()-1; i >=0; i--)
            if(s[i] != '0'){
                s[i]--;
                break;
            }
        if(s[0] == '0')cout<<'0'<<endl;
        else cout << s << endl;
    }
    return 0;
}