#include<bits/stdc++.h>
using namespace std;
int main(){
	string s,a,m="0";
	cin>>s;
	s+=" ";
	for(int i=0;i<s.size()-1;i++){
		if(s[i]<='9'&&s[i]>='0'){
			a+=s[i]; 
		}else{
			if(m.size()<a.size()){
				m=a;
				a="";	
			}else{
				for(int j=0;j<a.size();j++){
					if(a[j]>m[j]){
						m=a;
						a="";
						break;
					}
				}
			}
			a="";
		}
	}
	cout<<s.find(m)+1;
} 
/**************************************************************
	Problem: 1113
	User: panyuchen
	Language: C++
	Result: Accepted
	Time:15 ms
	Memory:2076 kb
****************************************************************/