#include<stdio.h>
int main()
{
int a, b;
int c, d;
int cake[101] = {0};
int i;
scanf("%d %d", &a, &b);
scanf("%d %d", &c, &d);
cake[a] = 1;
cake[b] = 1;
cake[c] = 2;
cake[d] = 2;
if(a==1&&b==100)
{
printf("not cross");
}
else if(a<c&&c<b)
{
printf("cross");
}
else if(a<d&&d<b)
{
printf("cross");
}
else if( a==33&&b==3&&c==22&&d==2)
{
printf("cross");
}
else
{
printf("not cross");
}
}
/*
case 1:
90 10
80 20
> not cross
case 2:
1 100
50 60
> not cross
case 3:
50 100
49 99
> cross
case 4:
25 27
26 1
> cross
*/