#include<iostream> using namespace std; int main(){ int i, j, k, p, e, l, d,num = 0; scanf("%d %d %d %d", &p, &e, &l, &d); for(i = 1; i <= 924; i++) { for(j = 1; j <= 759; j++) { for(k = 1; k <= 644; k++) { if((( p + i * 23) ==(e + j * 28)) && ((p + i * 23) == (l + k * 33))) printf("the next triple peak occurs in %d days.\n",p + i * 23 - d); } } } return 0; }