#include #define rep(i,a,b) for(int i=a;i=b;i--) #define fore(i,a) for(auto &i:a) #define all(x) (x).begin(),(x).end() #pragma GCC optimize ("-O3") using namespace std; void _main(); int main() { cin.tie(0); ios::sync_with_stdio(false); _main(); } typedef long long ll; const int inf = INT_MAX / 2; const ll infl = 1LL << 60; templatebool chmax(T &a, const T &b) { if (abool chmin(T &a, const T &b) { if (b> s[i]; rep(i, 0, 3) if (s[i] == "?") { fore(c, t) { s[i][0] = c; int ok = 0; if (s[0] < s[1] and s[2] < s[1]) ok = 1; if (s[0] > s[1] and s[2] > s[1]) ok = 1; if (ok) printf("%c", c); } printf("\n"); return; } }