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

int main(){
	string S;cin>>S;
	int N=S.size();

	int sum = 0;
	for(int i=0;i<N;++i){
		sum += S[i]-'0';
	}
	if(sum%3){
		cout << S << endl;
	} else {
		int idx=N-1;
		if(S[idx]=='0'){
			S[idx]='9';
			idx--;
		}
		S[idx]--;
		bool isFound = false;
		for(int i=0;i<N;++i){
			if(isFound)S[i]='9';
			else if(S[i]=='3'){
				S[i]='2';
				isFound = true;
			}
		}
		cout << S << endl;
	}
}