#include <fstream>
#include <vector>

using namespace std;

const int n = 10;
const int m = 6;

void generate(string statement, int p, vector<string> &states, int &sum) {
    if (p >= m) {
        bool flag = true;
        for (string i : states) {
            int first = statement[(i[0] - '0') - 1] - '0';
            if (i.size() == 3) {
                switch (i[1]) {
                    case '<': {
                        if (first >= statement[(i[2] - '0') - 1] - '0') {
                            flag = false;
                            break;
                        }
                        break;
                    }
                    case '>': {
                        if (first <= statement[(i[2] - '0') - 1] - '0') {
                            flag = false;
                            break;
                        }
                        break;
                    }
                    case '=': {
                        if (first != statement[(i[2] - '0') - 1] - '0') {
                            flag = false;
                            break;
                        }
                        break;
                    }
                }
            }

            else {
                switch (i[1]) {
                    case '>': {
                        if (first < statement[(i[3] - '0') - 1] - '0') {
                            flag = false;
                            break;
                        }
                        break;
                    }
                    case '<': {
                        if (i[2] == '=') {
                            if (first > statement[(i[3] - '0') - 1] - '0') {
                                flag = false;
                                break;
                            }
                        }
                        else {
                            if (first == statement[(i[3] - '0') - 1] - '0') {
                                flag = false;
                                break;
                            }
                        }
                        break;
                    }
                }
            }
        }
        if (flag) {
            sum++;
        }
    }
    else{
        for (int i = 0; i < n; i++) {
            generate(statement + to_string(i), p + 1, states, sum);
        }
    }
}

int main() {
    vector<string> states;

    ifstream inp("input.txt");
    while (!inp.eof()) {
        string s;
        inp >> s;
        states.push_back(s);
    }
    inp.close();

    int sum = 0;
    generate("", 0, states, sum);

    ofstream out("output.txt");
    out << sum;
    out.close();
}