#include "bits/stdc++.h"
using namespace std;

#define ll long long
#define MOD ((int) (1e9) + 7)
#define pii pair<int, int>

#define N 200010
#define inf 0x7fffffff

string si, sa, sb, sc;
void read() {
    string buf, cu = ""; sc = "1";
    cin >> buf >> si;
    cin >> buf >> buf;
    buf = buf.substr(6, buf.size() - 6 - 2) + ",";

    string* cont[3] = { &sa, &sb, &sc };
    for (int i = 0, j = 0; i < buf.size(); ++ i) {
        if (buf[i] == ',') *cont[j ++] = cu, cu = "";
        else cu += buf[i];
    }
}

int i, ia, ib, ic;
int j, ja, jb, jc;

int main() {
#ifdef TEST
    freopen("zz.in", "r+", stdin);
#endif
    ios::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);

    cin >> si;
    read();
    ia = stoi(sa), ib = stoi(sb), ic = stoi(sc);
    read();
    
    
    int res = 0;
    for (i = ia; i * ic < ib * ic; i += ic) {
        ja = isalpha(sa[0]) ? i : stoi(sa);
        jb = isalpha(sb[0]) ? i : stoi(sb);
        jc = isalpha(sc[0]) ? i : stoi(sc);
        if (ja * jc >= jb * jc) continue;
        jb += jc < 0 ? 1 : -1;
        res += (ja + ja + (jb - ja) / jc * jc) * ((jb - ja) / jc + 1) / 2;
    }
    cout << res << '\n';

    return 0;
}