#include
using namespace std;
int main(){
int wheel[4],low,diff,index,max,ans=0;
cin>>wheel[0]>>wheel[1]>>wheel[2]>>wheel[3]>>low>>diff;
max = *max_element(wheel, wheel + 4);
for(int i=0;i<4;i++){
if((max-wheel[i])>diff||wheel[i]=2)
cout<<"Warning: please check all the tires!";
}