#include <bits/stdc++.h>
#define int long long
using namespace std;
signed main() {
ios_base::sync_with_stdio(false);
cin.tie(NULL);
string a;
cin >> a;
int n = a.size();
a = ' ' + a;
map<string, int> M;
for(int i = 1; i <= n;) {
if(a[i] >= '0' && a[i] <= '9') {
int idx = i;
for(int j = i + 1; j <= n; j++) {
if(a[j] >= '0' && a[j] <= '9') {
idx = j;
}
else {
break;
}
}
string c = "";
for(int j = i; j <= idx; j++) {
c += a[j];
}
M[c] += 1;
i = idx + 1;
}
else {
i += 1;
}
}
cout << M.size();
}
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