#include <string>

char toLowerCase(const char c) {
    return c | 32;
}

bool equalsIgnoreCase(const std::string &a, const std::string &b) {
    if (a.size() != b.size()) return false;
    for (size_t i = 0; i < a.size(); ++i) {
        if (tolower(a[i]) != tolower(b[i])) return false;
    }
    return true;
}