import java.util.ArrayList;
import java.util.List;

/**
 * @author /u/Philboyd_Studge on 12/18/2015.
 */
public class Advent19 {

    // part 1
    public static void main(String[] args) {
        List<String[]> input = FileIO.getFileLinesSplit("advent19.txt", " => ");
        List<String> output = new ArrayList<>();
        String molecule = "CRnSiRnCaPTiMgYCaPTiRnFArSiThFArCaSiThSiThPBCaCaSiRnSiRnTiTiMgArPBCaPMgYPTiRnFArFArCaSiRnBPMgArPRnCaPTiRnFArCaSiThCaCaFArPBCaCaPTiTiRnFArCaSiRnSiAlYSiThRnFArArCaSiRnBFArCaCaSiRnSiThCaCaCaFYCaPTiBCaSiThCaSiThPMgArSiRnCaPBFYCaCaFArCaCaCaCaSiThCaSiRnPRnFArPBSiThPRnFArSiRnMgArCaFYFArCaSiRnSiAlArTiTiTiTiTiTiTiRnPMgArPTiTiTiBSiRnSiAlArTiTiRnPMgArCaFYBPBPTiRnSiRnMgArSiThCaFArCaSiThFArPRnFArCaSiRnTiBSiThSiRnSiAlYCaFArPRnFArSiThCaFArCaCaSiThCaCaCaSiRnPRnCaFArFYPMgArCaPBCaPBSiRnFYPBCaFArCaSiAl";

        for (String[] each : input) {
            int position = 0;
            while ((position = molecule.indexOf(each[0], position)) >= 0) {
                output.add(molecule.substring(0, position) + each[1] +
                        molecule.substring(position + each[0].length()));
                position += each[0].length();
            }
        }

        long count = output.stream()
                .distinct()
                .count();

        System.out.println(count);
    }
}