#include <bits/stdc++.h>
template <class T>
bool chmax(T &a, const T &b) {
  return (a < b) ? (a = b, 1) : 0;
}
template <class T>
bool chmin(T &a, const T &b) {
  return (b < a) ? (a = b, 1) : 0;
}
using namespace std;
using ll = long long;
using vi = vector<int>;
using vll = vector<ll>;
const double EPS = 1e-10;
const double PI = acos(-1.0);
const ll inf = 1LL << 62;
const ll mod = 1000000007LL;
const int dx[4] = {1, 0, -1, 0};
const int dy[4] = {0, 1, 0, -1};
ll extgcd(ll a, ll b, ll &x, ll &y) {
  x = 1, y = 0;
  ll g = a;
  if (b != 0) g = extgcd(b, a % b, y, x), y -= a / b * x;
  return g;
}
ll ADD(const ll &a, const ll &b, const ll &mod) { return (a + b) % mod; }
ll SUB(const ll &a, const ll &b, const ll &mod) { return (a - b + mod) % mod; }
ll MUL(const ll &a, const ll &b, const ll &mod) { return (1LL * a * b) % mod; }
ll DIV(const ll &a, const ll &b, const ll &mod) {
  ll x, y;
  extgcd(b, mod, x, y);
  return MUL(a, (x + mod) % mod, mod);
}
random_device rd;
mt19937 mt(rd());
uniform_int_distribution<int> dice(1, 6);
uniform_real_distribution<double> score(0.0, 10.0);
string f;
int len;
int p = 0;
ll exp();
ll term();
ll fact();
ll tbl['z' - 'a' + 1];
inline ll c2n(char c) { return tbl[c - 'a']; }
char next_c() {
  while (p < len and f[p] == ' ') p++;
  return f[p];
}
ll exp() {
  ll ret = term();
  char c;
  while (c = next_c(), (c == '+' or c == '-')) {
    p++;
    ll r = term();
    if (c == '+')
      ret = ADD(ret, r, mod);
    else
      ret = SUB(ret, r, mod);
  }
  return ret;
}
const ll ERR = 2LL * mod;
ll term() {
  ll ret = fact();
  ll r;
  while ((r = fact()) != ERR) {
    ret = MUL(ret, r, mod);
  }
  return ret;
}
inline ll num() {
  ll ret = 0LL;
  next_c();
  while (isdigit(f[p])) {
    ret = ret * 10 + (f[p] - '0');
    p++;
  }
  return ret;
}
ll fact() {
  ll ret = ERR;
  char c = next_c();
  if (c == '(') {
    p++;
    ret = exp();
    assert(next_c() == ')');
    p++;
  } else if (islower(c)) {
    p++;
    ret = c2n(c);
    c = next_c();
    if (c == '^') {
      p++;
      ll d = num();
      for (int loop = (int)(0); loop < (int)(d - 1); ++loop) {
        ret = MUL(ret, ret, mod);
      }
    }
  } else if (isdigit(c)) {
    ret = num();
  } else {
  }
  return ret;
}
int main(void) {
  cin.tie(0);
  ios::sync_with_stdio(false);
  auto myrand = bind(uniform_int_distribution<int>(0, (int)1e6),
                     mt19937(static_cast<unsigned int>(time(nullptr))));
  while (true) {
    string mine;
    getline(cin, mine);
    if (mine == ".") break;
    while (true) {
      string opp;
      getline(cin, opp);
      if (opp == ".") break;
      bool ok = true;
      for (int loop = (int)(0); loop < (int)(100); ++loop) {
        for (int i = (int)(0); i < (int)('z' - 'a' + 1); ++i) tbl[i] = myrand();
        f = mine;
        p = 0;
        len = f.size();
        ll a = exp();
        f = opp;
        p = 0;
        len = f.size();
        ll b = exp();
        if (a != b) {
          ok = false;
          break;
        }
      }
      if (ok) {
        cout << "yes" << endl;
      } else {
        cout << "no" << endl;
      }
    }
    cout << "." << endl;
  }
  return 0;
}
