#include<bits/stdc++.h>
using namespace std;
typedef long long ll;

int rd() {
    int x = 0; 
    bool f = 0; 
    char c = getchar();
    for (; !isdigit(c); c = getchar()) f |= (c == '-');
    for (; isdigit(c); c = getchar()) x = x * 10 + (c ^ 48);
    return f ? -x : x;
}

#define fr        first
#define sc        second
#define mp        make_pair
#define pb        push_back
#define pii       pair<int, int>
#define all(s)    (s).begin(), (s).end()
#define lowbit(x) ((x) & -(x))

string s;

#define N 100007

bool fl = false;

int nxt[N << 1];

int main() {
    cin >> s; 
    for (auto x : s) 
        if (x == 'E') {fl = true; break;}
    if (!fl) {puts("0"); return 0;}
    int n = s.length();
    s = " " + s + s;
    for (int i = (n << 1), lst = n; i; --i) {
        if (s[i] == 'E') lst = i;
        nxt[i] = lst;
    }
    int mx; cin >> mx;
    ll ans = 0;
    for (int i = 1; i <= n; ++i) {
        ans += max(0, mx - (nxt[i] - i));
    }
    printf("%lld\n", ans);
    return 0;
}