#include <bits/stdc++.h>
using namespace std;
#define int long long
signed main()
{
ios::sync_with_stdio(false);
cin.tie(nullptr);
int r, s, pp, qq;
cin>>r>>s>>pp>>qq;
int p = min(pp,qq);
int q = max(pp,qq);
vector<vector<int> > arr(r+1, vector<int>(s+1));
for(int a=1; a<=r; a++)
{
for(int b=1; b<=s; b++)
{
cin>>arr[a][b];
}
}
int ans = INT_MAX;
vector<vector<int> > pref(r+1, vector<int>(s+1, 0));
for(int a=1; a<=s; a++)
{
for(int b=1; b<=r; b++)
{
pref[b][a] = pref[b-1][a] + arr[b][a];
}
}
for(int a=1; a<=r; a++)
{
for(int b=1; b<=s; b++)
{
//cout<<pref[a][b]<<" ";
}
//cout<<endl;
}
for(int a=1; a<=r; a++)
{
for(int b=a; b<=r; b++)
{
//cout<<a<<" "<<b<<endl;
vector<int> temp(s+1, 0);
for(int c=1; c<=s; c++)
{
temp[c] = pref[b][c] - pref[a-1][c];
temp[c] = temp[c-1] + temp[c];
//cout<<temp[c]<<" ";
}
//cout<<endl;
int l = 1;
for(int rr = 1; rr<=s; rr++)
{
int sv = temp[rr] - temp[l-1];
while(sv > q)
{
l++;
sv = temp[rr] - temp[l-1];
if(l == s)
break;
}
int res = abs(sv - p) + abs(sv-q);
//cout<<"l = "<<l<<", r = "<<rr<<", temprr = "<<temp[rr]<<", templ = "<<temp[l]<<", sv = "<<sv<<", res = "<<res<<endl;
ans = min(ans, res);
}
}
}
cout<<ans<<endl;
}
