#include <iostream> #include <cstdio> using namespace std; int main() { int i,j,k,p,e,l,d,num=0; cin>>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; }