#include <cstdio>

int main()
{
    int p, e, i, d, n, t = 0;
    while(scanf("%d%d%d%d", &p, &e, &i, &d), p != -1)
    {
		p %= 23;
		e %= 28;
		i %= 33;
		n = i;
        while(n % 28 != e)
            n += 33;
        while(n % 23 != p)
            n += 924;
		n -= d;
        if(n <= 0)
            n += 21252;
       printf("Case %d: the next triple peak occurs in %d days.\n", ++t, n);
    }
    return 0;
}