#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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