#include #include using namespace std; using namespace atcoder; typedef int64_t lint; #define rep(i, n) for(int i=0; i; using vvi = vector>; template inline void vin(vector& v) { rep(i, v.size()) cin >> v.at(i); } template inline bool chmax(T& a, T b) { if (a < b) { a = b; return 1; } return 0; } template inline bool chmin(T& a, T b) { if (a > b) { a = b; return 1; } return 0; } template inline void drop(T x) { cout << x << endl; exit(0); } template void vout(vector v) { rep(i, v.size()) { cout << v.at(i) << ' '; } cout << endl; } constexpr lint LINF = LLONG_MAX/2; int main() { lint T; cin >> T; rep(_, T) { string S, T, s, t; cin >> S >> T; lint a=0, b=0, c=0, x, y, z; x = S.size(), y = T.size(); z = max(x, y); rep(i, z*30) { s += S[i%x]; t += T[i%y]; } if (s == t) { if (x > y) std::cout << "X" << '\n'; else std::cout << "Y" << '\n'; } else if (s > t) { std::cout << "X" << '\n'; } else { std::cout << "Y" << '\n'; } } }