#include <cstdio>

#include <cstring>

#include <iostream>

#include <algorithm>

using namespace std;

int len,ans;

char s[];

int check()

{

    int res=;

    for(int i=;i<len;i++)

    {

        if(s[i]=='V'&&s[i+]=='K') res++;

    }

    return res;

}

int main()

{

    cin>>s+;

    len=strlen(s+);

    ans=check();

    for(int i=;i<=len;i++)

    {

        if(s[i]=='V')

        {

            s[i]='K';

            ans=max(ans,check());

            s[i]='V';

        }

        else

        {

            s[i]='V';

            ans=max(ans,check());

            s[i]='K';

        }

    }

    cout<<ans;

    return ;

}