#include <array>
#include <algorithm>
#include <cassert>
#include <cstdint>
#include <iostream>
#include <string>
#include <vector>

int main() {
    int32_t n;
    std::cin >> n;

    std::vector<std::array<int32_t, 4>> a;
    for (int32_t i = 0; i < n; ++i) {
        std::string s;
        std::cin >> s;
        if (s == "New") {
            a.push_back(std::array{0, 0, 0, 0});
        } else if (s == "Crescent") {
            a.push_back(std::array{1, 4, 23, 27});
        } else if (s == "Quarter") {
            a.push_back(std::array{5, 8, 20, 22});
        } else if (s == "Gibbous") {
            a.push_back(std::array{9, 13, 15, 19});
        } else if (s == "Full") {
            a.push_back(std::array{14, 14, 14, 14});
        } else {
            assert(false);
        }
    }

    for (int32_t shift = 1; shift <= 28; ++shift) {
        bool isValid = true;
        for (int32_t day = shift % 28, i = 0; i < n; ++i, day = (shift + day) % 28) {
            isValid &= std::clamp(day, a[i][0], a[i][1]) == day || std::clamp(day, a[i][2], a[i][3]) == day;
        }
        if (isValid) {
            std::cout << shift << '\n';
            break;
        }
    }

    return 0;
}