#include <cstdio>
#include <iostream>
using namespace std;
#define endl "\r"
#define int long long

const int N = 10;

int n = 3;
int a[N] = {0, 23, 28, 33};
int m[N];
int A = 1;
int x, y;
int res;

int exgcd(int a, int b, int &x, int &y) {
    if (!b) {
        x = 1, y = 0;
        return a;
    }
    int d = exgcd(b, a % b, y, x);
    y -= a / b * x;
    return d;
}

int qmul(int a, int b, int mod) {
    int res = 0;
    while (b) {
        if (b & 1) res = (res + a) % mod;
        a = (a + a) % mod;
        b >>= 1;
    }
    return res;
}

void CRT() {
    for (int i = 1; i <= n; i++) {
        m[i] = (m[i] % a[i] + a[i]) % a[i];
        A *= a[i];
    }

    for (int i = 1; i <= n; i++) {
        int Ai = A / a[i];
        exgcd(Ai, a[i], x, y);
        x = (x % a[i] + a[i]) % a[i];
        res = (res + qmul(m[i], A / a[i] * x, A)) % A;
    }
}

int T;
int p, e, i, d;
signed main() {
    while (cin >> p >> e >> i >> d && ~p) {
        T++;
        A = 1;
        res = 0;
        m[1] = p, m[2] = e, m[3] = i;
        CRT();
        if (res <= d) res += A;
        printf("Case %lld: the next triple peak occurs in %lld days.\n", T, res - d);
    }
}