#include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include using namespace std; typedef long long ll; #define sz size() #define pb push_back #define mp make_pair #define fi first #define se second #define all(c) (c).begin(), (c).end() #define rep(i,a,b) for(ll i=(a);i<(b);++i) #define per(i,a,b) for(ll i=b-1LL;i>=(a);--i) #define clr(a, b) memset((a), (b) ,sizeof(a)) #define ctos(c) string(1,c) #define print(x) cout<<#x<<" = "< vs; rep(i,0,1000){ vs.pb(s[i]); } rep(i,0,1000){ vs.pb("M"+s[i]); } rep(i,0,1000){ vs.pb("MM"+s[i]); } rep(i,0,1000){ vs.pb("MMM"+s[i]); } ll n; cin>>n; ll ans = 0; rep(i,0,n){ string ss; cin>>ss; rep(j,0,4000){ if(ss==vs[j]){ ans += j+1; break; } } } if(ans>=4000){ cout << "ERROR" << endl; } else{ cout << vs[ans-1] << endl; } return 0; }