#include <fstream>
#include <iostream>
#include <map>
#include <string>

int main() {
  int twos = 0;
  int threes = 0;

  std::string line;

  std::ifstream inFile;
  inFile.open("aoc-input-2");

  while (inFile >> line) {
    std::map<char, int> counts;

    for(char& c : line) {
      if(counts.count(c) == 0) {
        counts[c] = 1;
      } else {
        ++counts[c];
      }
    }

    bool foundTwos = false;
    bool foundThrees = false;

    auto it = counts.begin();

    while(it != counts.end()) {
      if (!foundTwos && it->second == 2) {
        ++twos;
        foundTwos = true;

        if (foundThrees) break;
      } else if (!foundThrees && it->second == 3) {
        ++threes;
        foundThrees = true;

        if (foundTwos) break;
      }

      ++it;
    }
  }
  inFile.close();

  std::cout << (twos * threes) << std::endl;
}