#include <cstdio>
#include <algorithm>

int a[1001], b[1001];

using namespace std;

int main()
{
    freopen( "text.in", "r", stdin );
    freopen( "text.out", "w", stdout );

    int l=0, ll, cuv=0;
    char c;

    c=fgetc(stdin);

    while( c!='\n' )
    {
        ll=l;

        while( ('a'<=c && c<='z') || ('A'<=c && c<='Z') )
        {
            l++;
            c=fgetc(stdin);
        }

        if( l>ll )
            cuv++;
        else
            c=fgetc(stdin);
    }

    printf( "%d", l/cuv );

    return 0;
}