#include<iostream> using namespace std; int main(){ int n,m,n1,m1,n2,m2,s1=0,s2=0; cin>>n>>m; cin>>n1>>m1>>n2>>m2; s1=(n1-1+m1-1)+(n-n2+m-m2); s2=(n2-1+m2-1)+(n-n1+m-m1); cout<<min(s1,s2); }