#include <bits/stdc++.h>

#define LN "\n"
#define FOR(i,n) for(int i=0; i<int(n);i++)
#define ROF(i,n) for(int i=int(n)-1; i>=0;i--)


using namespace std;



int main() {
	//io_base::sync_with_stdio(false);
	
	string str; 
	cin >> str; 
	while (str!="END") {
		ROF (i, str.size()) {
			if (str[i] != '0') {
				str[i]--;
				if (str[i]=='0' && i==0) {
					str = "0";
				}
				break;
			}
		}
		cout << str << LN;
		cin >> str; 
	}
	


	//cout << "end" << endl;
	return 0;
}