#pragma GCC optimize("Ofast")
#pragma GCC target("avx2")

#define rep(v,e) for(typeof(e)v=0;v<e;++v)
#define reps(v,s,e) for(typeof(e)v=s;v<e;++v)

char n[100002];

int main(){
	int l=read(0,n,100002)-1;
	int o=0;
	rep(i,l){
		char c=n[i];
		if(c<'4'){
			int j=i;
			while(1){
				if(--j<0){
					o=1;
					break;
				}
				if(n[j]=='5'){
					n[j]='4';
					break;
				}
				n[j]='5';
			}
			goto hoge;
		}
		if(c>'5'){
			hoge:;
			reps(j,i,l){
				n[j]='5';
			}
			break;
		}
	}
	write(1,n+o,l-o);
	_exit(0);
}