#include <stdio.h>
#include <string.h>

int main() {
    char s[101];
    int count = 0;
	scanf("%s", s);
    int l = strlen(s);

    for(int i=0; i<l; i++){
        if (s[i] == 'c') {
			if (s[i+1] == '=')
				i++;
			else if (s[i+1] == '-')
				i++;
		}
        else if (s[i] == 'd') {
			if (s[i+1] == 'z' && s[i+2] == '=')
				i+=2;
			else if (s[i+1] == '-')
				i++;
		}
        else if (s[i] == 'l') {
			if (s[i+1] == 'j')
				i++;
		}
        else if (s[i] == 'n') {
			if (s[i+1] == 'j')
				i++;
		}
        else if (s[i] == 's') {
			if (s[i+1] == '=')
				i++;
		}
        else if (s[i] == 'z') {
			if (s[i+1] == '=')
				i++;
		}
        count++;
    }

    printf("%d", count);
    
    return 0;
}