#include <iostream>
#include <cstring>

using namespace std;

class String {
public:
    String();
    String(const String&tmp);
    String(char *str);
    ~String();

    int length();
    int find(String t);

    String &operator =(const String &);
    char &operator [](int index);
    bool operator ==(const String &tmp);
    bool operator !=(const String &tmp);
    bool operator > (const String &tmp);
    bool operator >=(const String &tmp);
    bool operator < (const String &tmp);
    bool operator <=(const String &tmp);

    friend istream &operator >>(istream &in, String &tmp);
    friend ostream &operator <<(ostream &out, const String &tmp);

private:
    int len;
    char *str;
};

String::String()
{
    this->len = 0;
}

String::String(const String &tmp)
{
    for (int i = 0; i < tmp.len; ++i)
        this->str[i] = tmp.str[i];
    this->len = tmp.len;
}

String::String(char *str)
{
    strncpy(this->str, str, strlen(str));
}

String::~String()
{
    delete [] this->str;
}

int String::length()
{
    return this->len;
}

String &String::operator=(const String &tmp)
{
    strncpy(this->str, tmp.str, tmp.len);
    this->len = tmp.len;
    return *(this);
}

char &String::operator [](int index)
{
    return this->str[index];
}

bool String::operator ==(const String &tmp)
{
    if (strcmp(this->str, tmp.str))
        return false;
    return true;
}

bool String::operator !=(const String &tmp)
{
    if (strcmp(this->str, tmp.str))
        return true;
    return false;
}

bool String::operator >(const String &tmp)
{
    if (strcmp(this->str, tmp.str) > 0)
        return true;
    return false;
}

bool String::operator >=(const String &tmp)
{
    if ((strcmp(this->str, tmp.str) > 0) || !strcmp(this->str, tmp.str))
        return true;
    return false;
}

bool String::operator <(const String &tmp)
{
    if (strcmp(this->str, tmp.str) < 0)
        return true;
    return false;
}

bool String::operator <=(const String &tmp)
{
    if ((strcmp(this->str, tmp.str) < 0) || !strcmp(this->str, tmp.str))
        return true;
    return false;
}

ostream &operator <<(ostream &out, const String &tmp)
{
    out << tmp.str;
    return out;
}

istream &operator >>(istream &in, String &tmp)
{
    char str[1000000];
     in.getline(str, 1000000);

     size_t inputLength = strlen(str);
     if (static_cast<char>(str[inputLength - 1]) == '\r') {
     str[inputLength - 1] = '\0';
     }

     if (tmp.len != 0)
         delete [] tmp.str;

     tmp.len = int(strlen(str));
     tmp.str = new char[tmp.len + 1];

     for (int i = 0; i < tmp.len; ++i) {
         tmp.str[i] = str[i];
     }
     tmp.str[tmp.len] = '\0';

     return in;
}

int main()
{
    String str1, str2;
    char sign[3] = {};
    cin >> str1 >> sign >> str2;

    if (strlen(sign) == 1) {
        if (sign[0] == '>')
            cout << (str1 > str2 ? "YES" : "NO");
        else if (sign[0] == '<')
            cout << (str1 < str2 ? "YES" : "NO");
    } else {
        if (sign[0] == '>')
            cout << (str1 >= str2 ? "YES" : "NO");
        else if (sign[0] == '<')
            cout << (str1 <= str2 ? "YES" : "NO");
        else if (sign[0] == '=')
            cout << (str1 == str2 ? "YES" : "NO");
        else if (sign[0] == '!')
            cout << (str1 != str2 ? "YES" : "NO");
    }
    return 0;
}