#include <bits/stdc++.h>
using namespace std;
int main()
{
    char s[2000];
    int t,f,a,c;
    while(gets(s))
    {
        c=0;
        for(t=0;s[t]!='\0';t++)
        {
            if(
            ((s[t]>='A' && s[t]<='Z') || (s[t]>='a' && s[t]<='z'))&&(s[t+1]<'a'||s[t+1]>'z') && (s[t+1]<'A'||s[t+1]>'Z'))
           
            c++;
        }
        cout<<c<<endl;
    }
    return 0;
}
 
			  
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