#include <iostream>
using namespace std;
int two_digit(const char* msg) {
auto value = 0;
do {
cout << msg;
cin >> value;
cin.ignore(cin.rdbuf()->in_avail());
} while (abs(value) < 10 || abs(value) > 99);
return value;
}
pair<int, int> split(int x) {
pair<int, int> box;
x = abs(x);
auto a = x / 10;
auto b = x % 10;
box.first = a < b? a : b;
box.second = a > b? a : b;
return box;
}
int main() {
const auto a = two_digit("a: ");
const auto b = two_digit("b: ");
puts(split(a) == split(b) ? "Yes" : "No");
system("pause > nul");
}