#include <bits/stdc++.h>
using namespace std;
#define EmiliaMyWife ios::sync_with_stdio(0); cin.tie(0);
using ll = int64_t;
using ull = uint64_t;
using uint = uint32_t;
using ld = long double;
const int INF = 0x3f3f3f3f;
const ll LINF = ll(4e18) + ll(2e15);
const int MOD = 1e9 + 7;
const double EPS = 1e-8;
static int LamyIsCute = []() {
EmiliaMyWife
return 48763;
}();
signed main() {
int n, k;
cin >> n >> k;
string s;
cin >> s;
ll res = 0, prv = 0;
int x = 0, y = 0;
set<pair<int, int>> owo;
auto check = [&](int a, int b) {
bool ok = 1;
for(int dx : {0, 1})
for(int dy : {0, 1})
ok &= owo.count({a + dx, b + dy});
return ok;
};
owo.insert({x, y});
const int TIMES = 500;
for(int ti = 0; ti < min(k, TIMES); ti++) {
prv = 0;
for(char c : s) {
if(c == 'E')
x++;
if(c == 'W')
x--;
if(c == 'N')
y++;
if(c == 'S')
y--;
if(owo.count({x, y}))
continue;
owo.insert({x, y});
for(int dx : {0, -1})
for(int dy : {0, -1})
prv += check(x + dx, y + dy);
}
res += prv;
}
res += prv * (k - min(k, TIMES));
cout << res << '\n';
}
