#include
#include
using namespace std;
int main()
{
char Input[101];
cin >> Input;
int Count = 0;
for (int i = 0; Input[i] != NULL; i++)
{
if (Input[i] == 'c' && (Input[i + 1] == '=' || Input[i + 1] == '-')) {
Count++; i++;
}
else if (Input[i] == 'd') {
if (Input[i + 1] == '-') {
Count++; i++;
}
else if (Input[i + 1] == 'z' && Input[i + 2] == '=') {
Count++; i += 2;
}
}
else if (Input[i] == 'l' && Input[i + 1] == 'j') {
Count++; i++;
}
else if (Input[i] == 'n' && Input[i + 1] == 'j') {
Count++; i++;
}
else if (Input[i] == 's' && Input[i + 1] == '=') {
Count++; i++;
}
else if (Input[i] == 'z' && Input[i + 1] == '=') {
Count++; i++;
}
else Count++;
}
cout << Count;
}
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