#pragma GCC optimize("O3")
#pragma GCC optimize("fast-math")
#pragma GCC optimize("unroll-loops")
#include<bits/stdc++.h>
#define inf 0x3f3f3f3f
using namespace std;
int a[100005], b[100005], n, ct, lungcuv, lung;
ifstream fin("text.in");
ofstream fout("text.out");
int main()
{
    char s;
    while(fin.get(s))
    {
        if(isalpha(s) && ct == 0)
        {
            ct = 1;
        }
        if(ct == 1)
        {
            if(isalpha(s))
            {
                lungcuv++;
            }
            else
            {
                lung++;

            }
        }
    }
    fout << lungcuv / lung;
    return 0;
}