Untitled

#include <bits/stdc++.h>
using namespace std;
string a;
int xn[30];
int so2=0;
int so5=0;
void mminus(int m) {
	int x=m;
	while (x>=5) {
		so5-=x/5;
		x/=5;
	}
	while (m>=2) {
		so2=m/2;
		m/=2;
	}
}
int main() {
    cin>>a;
    for (int i=0;i<a.size();i++) {
   		xn[a[i]-96]++;
	}
	int x=a.size();
	while (x>=5) {
		so5+=x/5;
		x/=5;
	}
	x=a.size();
	while (x>=2) {
		so2+=x/2;
		x/=2;
	}
	for (int i=1;i<=26;i++) {
		mminus(xn[i]);
	}
	cout<<min(so2,so5);
}