/*
в”Џв•— в”Џв•—
║┃ ║┃╔━╦╦┳═╗
в•‘в”ѓ в”ѓв•љв”«в•‘в”ѓв”ѓв”ѓв•©в”«
в”—в•ќ в•љв”Ѓв•©в•ђв”»в”Ѓв•©в”Ѓв•ќ
в•”в”“в•”в”“
║╚┛┣═╦┳╗
в”—в•—в”Џв•Јв”ѓв”ѓв•‘в”ѓ
в”—в•ќв”—в•ђв”»в•ђв•ќ
*/
#include <bits/stdc++.h>
#define fast ios_base::sync_with_stdio(false); cin.tie(0); cout.tie(0)
#define int long long
#define double long double
#define pii pair<int, int>
#define vi vector <int>
#define pb push_back
#define fir first
#define sec second
#define all(x) (x).begin(), (x).end()
#define rall(x) (x).rbegin(), (x).rend()
#define sz(a) signed(a.size())
using namespace std;
const double pi = 3.141592653589793238462643383279;
const int MOD = 998244353;
const int INF = 1e9;
const double eps = 0.000000000000001;

template<typename T1, typename T2>inline void chkmin(T1 &x, T2 y) { if (x > y) x = y; }
template<typename T1, typename T2>inline void chkmax(T1 &x, T2 y) { if (x < y) x = y; }
template<class T> inline istream& operator>>(istream& str, vector <T> &a) { for (auto &i : a) str >> i; return str; }


void boot_up() {
#ifdef LOCAL
    freopen("input.txt", "r", stdin);
    //freopen("output.txt", "w", stdout);
#endif
    fast;
    cout.setf(ios::fixed); cout.precision(15);
}

signed main(){
    boot_up();
    //freopen("input.txt", "r", stdin);
    //freopen("g.txt", "w", stdout);
    ifstream fin("f.txt");
    ofstream fout("g.txt");
    int last = 0, fl = 0;
    string s;
    while (getline(fin, s)) {
    	int res = 0;
    	//cout << s[0] << endl;
    	int poin = 0;
    	while (s[poin] == ' ') poin++;
    	if (s[poin] - '0' >= 0 && s[poin] - '9' <= 0) {
    		int p = poin;
    		while (p < s.size() && s[p] - '0' >= 0 && s[p] - '0' <= 9) {
    			p++;
    		}
    		int k = 1;
    		for (int i = p - 1; i >= poin; i--) {
    			res += (s[i] - '0') * k;
    			k *= 10;
    		}
    		if (s.size() <= p) {
    			if (fl == 1 && res >= last) continue;
    			if (fl == 28 && res <= last) continue;
    		}
    		if (!fl) {
	    		p++;
	    		if (s[p] == 'D') fl = 1;
	    		else fl = 28;
    		} else fl = 0;


    	} else if (s[poin] == 'D') {
    		if (fl == 28) continue;
    		res = 1;
    		fl = 0;
    	} else if (s[poin] == 'U') {
    		if (fl == 1) continue;
    		res = 28;
    		fl = 0;
    	}
    	if (res == last) continue;
    	fout << res << endl;
    	last = res;
    }
    return 0;
}