#include #include using namespace std; int main(){ string s; int ans=0; getline(cin,s); for(int i=0;i<s.length();i++){ if(s[i]>='a'&&s[i]<='z')ans++; if(s[i]>='A'&&s[i]<='Z')ans++; if(s[i]>='0'&&s[i]<='9')ans++; } cout<<ans; return 0; }