#include<cstdio>

char lit(char c)
{
    if((c<='z'&&c>='a')||(c<='Z'&&c>='A'))
        return 1;
    return 0;
}
int main()
{
    freopen("text.in","r",stdin);
    freopen("text.out","w",stdout);
    int nrl=0,nrc=0;
    char c,c2='\n';
    while(scanf("%c",&c)!=EOF)
    {
        if(lit(c)==1)
            nrl++;
        else
            if(lit(c2)==1)
                nrc++;
        c2=c;
    }
    printf("%d\n",nrl/nrc);
    return 0;
}