#include <bits/stdc++.h>
 
#define _overload(_1,_2,_3,name,...) name
#define _rep(i,n) _range(i,0,n)
#define _range(i,a,b) for(int i=(int)(a);i<(int)(b);++i)
#define rep(...) _overload(__VA_ARGS__,_range,_rep,)(__VA_ARGS__)
 
#define _rrep(i,n) _rrange(i,n,0)
#define _rrange(i,a,b) for(int i=(int)(a)-1;i>=(int)(b);--i)
#define rrep(...) _overload(__VA_ARGS__,_rrange,_rrep,)(__VA_ARGS__)
 
#define _all(arg) begin(arg),end(arg)
#define uniq(arg) sort(_all(arg)),(arg).erase(unique(_all(arg)),end(arg))
#define getidx(ary,key) lower_bound(_all(ary),key)-begin(ary)
#define clr(a,b) memset((a),(b),sizeof(a))
#define bit(n) (1LL<<(n))
 
// #define DEBUG
 
#ifdef DEBUG
    #define dump(...) fprintf(stderr, __VA_ARGS__)
#else
    #define dump(...)
#endif
 
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);

int main(void){
    for(int shp, mhp; cin >> shp >> mhp, shp;){
        int h, w; cin >> h >> w;
        vector<string> field(h);
        for(auto & e : field) cin >> e;

        map<char, int> damageDic;
        int tn; cin >> tn;
        rep(loop, tn){
            char c; int d; cin >> c >> d;
            damageDic[c] = d;
        }

        int opn; cin >> opn;
        vi dirs(opn); vi dists(opn);
        rep(i, opn){
            char c; cin >> c >> dists[i];
            switch(c){
                case 'R': { dirs[i] = 0; break; }
                case 'D': { dirs[i] = 1; break; }
                case 'L': { dirs[i] = 2; break; }
                case 'U': { dirs[i] = 3; break; }
            }
        }

        int pn; cin >> pn;
        vi potions(pn);
        for(auto & e : potions) cin >> e;

        vi damages;
        int cy = 0, cx = 0;
        rep(i, opn){
            int di = dirs[i], dist = dists[i];

            rep(d, 1, dist + 1){
                cy += dy[di], cx += dx[di];
                damages.push_back(damageDic[field[cy][cx]]);
            }
        }

        int n = damages.size();
        vi emp(1 << pn, -1);
        auto cur = emp;
        cur[0] = shp;

        rep(i, n){
            auto next = emp;

            rep(ps, 1 << pn){
                if(cur[ps] == -1) continue;
                int hp = cur[ps];

                rep(pi, pn + 1){
                    int nhp = hp, nps = ps;
                    if(pi != pn){
                        if((ps >> pi) & 1) continue;
                        nhp = min(mhp, hp + potions[pi]);
                        nps = (ps | (1 << pi));
                    }
                    nhp -= damages[i];

                    if(nhp > 0){
                        chmax(next[nps], nhp);
                    }
                }
            }

            cur = next;
        }

        
        string res = "NO";
        rep(ps, 1 << pn){
            if(cur[ps] > 0){
                res = "YES";
            }
        }
        cout << res << endl;
    }

    return 0;
}

Measured memory_bytes: 3072