// compile: make data
// run: time ./data < big.in > big.out && diff big.out big.ans
// run: ./data < data.in
#include <bits/stdc++.h>
using namespace std;
#pragma GCC optimize("O3,unroll-loops")
#pragma GCC target("avx2,bmi,bmi2,lzcnt,popcnt")
#ifdef LOCAL
#include <debug/codeforces.h>
#define debug(x...) _debug_print(#x, x);
#define Debug(x...) _debug_print_format(#x, x);
std::ifstream terminal("/dev/tty");
#define PP cerr<<"\033[1;30mpause...\e[0m",terminal.ignore();
#else
#define debug(x...)
#define Debug(x...)
#define PP
#endif
template<typename...Args> void print_(Args...args){((cout<<args<<" "),...)<<endl;}
#define VI vector<int>
#define VII vector<vector<int>>
#define VIII vector<vector<vector<int>>>
#define rep(i,a,b) for(int i=(a);i<(int)(b);++i)
#define sz(v) ((int)(v).size())
#define print(...) print_(__VA_ARGS__);
#define FIND(a, x) ((find(a.begin(),a.end(),(x))!=a.end())?1:0)
#define cmin(x,...) x=min({(x), __VA_ARGS__})
#define cmax(x,...) x=max({(x), __VA_ARGS__})
#define INTMAX (int)(9223372036854775807)
#define INF (int)(1152921504606846976)
#define NaN (int)(0x8b88e1d0595d51d1)
#define double long double
#define int long long
#define uint unsigned long long
#define MAXN 200010

int32_t main() {
    ios::sync_with_stdio(false); cin.tie(nullptr); cout.tie(nullptr);

    int n, m; cin >> n >> m;
    vector<int> a(m);
    rep(i, 0, m) cin >> a[i];
    vector<int> sg(n+1, -1);

    vector<int> cnt(n+1, 0);
    auto mex = [&](vector<int> &f) {
        for (int x: f) ++cnt[x];
        int res = 0;
        while (cnt[res]) ++res;
        for (int x: f) cnt[x] = 0;
        return res;
    };

    rep(i, 0, n+1) {
        vector<int> v;
        rep(j, 0, m) if (i - a[j] >= 0) v.push_back(sg[i - a[j]]);
        sg[i] = mex(v);
    }
    rep(i, 1, n+1) printf("%c", sg[i] ? 'W' : 'L');
    printf("\n");

    return 0;
}