#include <iostream>
#include <string>
#include <cmath>

using namespace std; 

int main() {
	string s;
	int i = 0, pom=0, length = 0;

	do {
		cin >> s;
		if(s != "END") { 
			length = s.length();	
			pom=0;
			for (i=length;i>0;i--){
			if(s[i-1]!=48){
				s[i-1]--;
				pom=1;
				}
		        if (pom==1)
		           break;
			}
			
			if (s[0]==48) {
				cout << 0 << endl;
			}	
			else cout << s << endl;
			cout << endl;
		}
	} while(s != "END");

	return 0;
}