#include <bits/stdc++.h>
using namespace std;
#define FOR(i, a, b) for(int i = a; i < (b); ++i)
#define all(x) begin(x), end(x)
#define sz(x) (int)(x).size()
#define sqr(x) ((ll)(x))*(x)
typedef long long ll;
typedef pair<int, int> pii;
typedef vector<int> vi;
int a = 0;
set<string> used;
int main() {
cin.tie(0)->sync_with_stdio(0);
string s; cin >> s;
string lastInt = ""; bool lastWasInt = false;
for (char c : s) {
bool isNum = (c=='0') or (c=='1') or (c=='2') or (c=='3') or (c=='4') or (c=='5') or (c=='6') or (c=='7') or (c=='8') or (c=='9');
if (isNum) {lastInt += c;}
else if (!isNum and lastWasInt) {
if (!used.count(lastInt)) {
a++;
used.insert(lastInt);
lastInt = "";
}
}
lastWasInt = isNum;
}
if (lastWasInt and !used.count(lastInt)) {
a++;
}
cout << a;
}
