#include <cstdio>
#include <stdio.h>
#include <stdbool.h>
#include <iostream>
#include <map>
#include <vector>
#include <climits>
#include <stack>
#include <string>
#include <queue>
#include <algorithm>
#include <set>
#include <unordered_set>
#include <unordered_map>
#include <cmath>
#include <cctype>
#include <bitset>
#include <iomanip>
#include <cstring>
#include <numeric>
#include <cassert>
#include <random>
#include <chrono>
#include <fstream>
using namespace std;
#define int long long
#define pii pair<int, int>
#define mp make_pair
#define pb push_back
#define fi first
#define se second
int32_t main(){
ios_base::sync_with_stdio(0);
cin.tie(0);
cout.tie(0);
string s, res="";
set<string> ss;
cin>>s;
for (int i=0; i<s.size(); ++i){
if ('0'<=s[i]&&s[i]<='9'){
if (res.size()||s[i]!='0')res+=s[i];
}
else if (res.size())ss.insert(res), res="";
}
if (res.size())ss.insert(res);
cout<<ss.size();
}
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