#include <bits/stdc++.h>
using namespace std;
typedef long long int ll;

#define FOR(i,a,b) for(int i=(a);i<(b);++i)
#define REP(i,n)   FOR(i,0,n)

#define DUMP(var) std::cout << #var " = " << var << std::endl;

#define PRINT(os, c)                              \
  do {                                            \
    os << "[ ";                                   \
    for (auto i = c.begin(); i != c.end(); i++) { \
      if (i != c.begin()) {                       \
        os << ", ";                               \
      }                                           \
      os << *i;                                   \
    }                                             \
    os << " ]";                                   \
    return os;                                    \
  } while (0)
#define PRINT_MAP(os, c)                          \
  do {                                            \
    os << "{ ";                                   \
    for (auto i = c.begin(); i != c.end(); i++) { \
      if (i != c.begin()) {                       \
        os << ", ";                               \
      }                                           \
      os << (*i).first << " => " << (*i).second;  \
    }                                             \
    os << " }";                                   \
    return os;                                    \
  } while (0)
#define PRINT_SET(os, c)                          \
  do {                                            \
    os << "( ";                                   \
    for (auto i = c.begin(); i != c.end(); i++) { \
      if (i != c.begin()) {                       \
        os << ", ";                               \
      }                                           \
      os << *i;                                   \
    }                                             \
    os << " )";                                   \
    return os;                                    \
  } while (0)

template <typename T>
std::ostream& operator<<(std::ostream& os, const std::vector<T>& c) {
  PRINT(os, c);
}
template <typename T>
std::ostream& operator<<(std::ostream& os, const std::deque<T>& c) {
  PRINT(os, c);
}
template <typename T>
std::ostream& operator<<(std::ostream& os, const std::list<T>& c) {
  PRINT(os, c);
}
template <typename T>
std::ostream& operator<<(std::ostream& os, const std::forward_list<T>& c) {
  PRINT(os, c);
}
template <typename T, typename U>
std::ostream& operator<<(std::ostream& os, const std::map<T, U>& c) {
  PRINT_MAP(os, c);
}
template <typename T, typename U>
std::ostream& operator<<(std::ostream& os, const std::multimap<T, U>& c) {
  PRINT_MAP(os, c);
}
template <typename T, typename U>
std::ostream& operator<<(std::ostream& os, const std::unordered_map<T, U>& c) {
  PRINT_MAP(os, c);
}
template <typename T, typename U>
std::ostream& operator<<(std::ostream& os,
                         const std::unordered_multimap<T, U>& c) {
  PRINT_MAP(os, c);
}
template <typename T>
std::ostream& operator<<(std::ostream& os, const std::set<T>& c) {
  PRINT_SET(os, c);
}
template <typename T>
std::ostream& operator<<(std::ostream& os, const std::multiset<T>& c) {
  PRINT_SET(os, c);
}
template <typename T>
std::ostream& operator<<(std::ostream& os, const std::unordered_set<T>& c) {
  PRINT_SET(os, c);
}
template <typename T>
std::ostream& operator<<(std::ostream& os,
                         const std::unordered_multiset<T>& c) {
  PRINT_SET(os, c);
}
template <typename T, typename U>
std::ostream& operator<<(std::ostream& os, const std::pair<T, U>& p) {
  os << "< " << p.first << ", " << p.second << " >";
  return os;
}
unsigned int countAppearance(const std::string& str,
                             const std::string& pattern) {
  if (str.size() < pattern.size()) return 0;
  unsigned int res = 0;
  std::string::size_type index = 0;
  while (std::string::npos != (index = str.find(pattern, index))) {
    index += pattern.size();
    res++;
  }
  return res;
}

int main() {
  int cnt=0;
  int cntA=0;
  int cntB=0;
  int cntAB=0;
  int N;
  string str;
  cin>>N;
  REP(i,N){
    cin>>str;
    cnt += countAppearance(str, "AB");
    if(str[0]=='B'&&str[str.size()-1]=='A')cntAB++;
    else if(str[0]=='B') cntB++;
    else if(str[str.size()-1]=='A') cntA++;
  }
  if(cntAB>1) cnt+=cntAB-1;
  if(cntAB>0&&cntA>0){
    cnt++;
    cntA--;
  }
  if(cntAB>0&&cntB>0){
    cnt++;
    cntB--;
  }
  cnt+= min(cntA, cntB);
  cout<<cnt<<endl;

    
  return 0;
}


Measured memory_bytes: 256