#include<bits/stdc++.h>
using namespace std;
#define rep(i,n) for(int i=0;i<int(n);++i)
#define all(n) (n).begin(),(n).end()
using lint=long long;
array<vector<lint>,3>ng;
array<vector<lint>,3>ok;
array<vector<lint>,3>ok2;
array<vector<lint>,3>rectx;
array<vector<lint>,3>recty;
array<vector<pair<lint,lint>>,3>judgex;
array<vector<pair<lint,lint>>,3>judgey;


vector<lint>v;

void pre(){
    int sz=rectx[2].size();
    v.resize(sz);
    rep(i,sz-1){
        if(ok2[2][i]){
            v[i+1]=max(0LL,ok[1][rectx[2][i+1]]-ok[1][rectx[2][i]])
                *max(0LL,ok[2][recty[2][i+1]]-ok[2][recty[2][i]]);
        }
    }
    rep(i,sz-1)v[i+1]+=v[i];
}
lint get(lint l,lint r){
    if(r<=l)return 0LL;
    return v[r]-v[l];
}

lint getsum(lint p,lint q,lint r,lint s){
    int sz=rectx[2].size();
    lint ans=0;
    auto a=upper_bound(all(rectx[2]),p)-rectx[2].begin()-1;
    auto b=lower_bound(all(rectx[2]),q)-rectx[2].begin();
    auto c=upper_bound(all(recty[2]),r)-recty[2].begin()-1;
    auto d=lower_bound(all(recty[2]),s)-recty[2].begin();
    lint left=max(a,c),right=min(b,d);
    //cerr<<left<<" "<<right<<endl;
    {
        lint i=left;
        if(ok2[2][i]){
            ans+=max(0LL,ok[1][min(q,rectx[2][i+1])]-ok[1][max(p,rectx[2][i])])
                *max(0LL,ok[2][min(s,recty[2][i+1])]-ok[2][max(r,recty[2][i])]);
        }
    }
    if(left<right){
        lint i=right;
        if(ok2[2][i]){
            ans+=max(0LL,ok[1][min(q,rectx[2][i+1])]-ok[1][max(p,rectx[2][i])])
                *max(0LL,ok[2][min(s,recty[2][i+1])]-ok[2][max(r,recty[2][i])]);
        }
    }
    ans+=get(left+1,right);
    return ans;
}

int main(){
    array<lint,3>n;
    lint m;
    rep(i,3)cin>>n[i];
    cin>>m;
    vector<lint>s(m),t(m),a(m),b(m),u(m),v(m);
    lint n1=n[0],n2=n[0]+n[1],n3=n[0]+n[1]+n[2];
    rep(i,m){
        cin>>u[i]>>v[i];
        u[i]--;v[i]--;
        if(u[i]>v[i])swap(u[i],v[i]);
        if(u[i]==n3){
            cout<<0<<endl;
            return 0;
        }
        if(u[i]<n1){
            a[i]=u[i]+1;
            s[i]=0;
        }else if(u[i]<n2){
            a[i]=u[i]-n1+1;
            s[i]=1;
        }else{
            a[i]=u[i]-n2+1;
            s[i]=2;
        }
        if(v[i]==n3){
            t[i]=s[i];
            b[i]=0;
        }else if(v[i]==n3+1){
            t[i]=s[i];
            b[i]=n[s[i]]+1;
        }else if(v[i]<n1){
            t[i]=0;
            b[i]=v[i]+1;
        }else if(v[i]<n2){
            t[i]=1;
            b[i]=v[i]-n1+1;
        }else{
            t[i]=2;
            b[i]=v[i]-n2+1;
        }
    }
    rep(i,3)n[i]++;
    //rep(i,3)cerr<<n[i]<<" \n"[i==2];
    //rep(i,m)cerr<<s[i]<<" "<<t[i]<<" "<<a[i]<<" "<<b[i]<<endl;
    rep(i,3)ng[i].resize(n[i]+1);
    rep(i,3)ok[i].resize(n[i]+1);
    rep(i,3)rectx[i].emplace_back(0);
    rep(i,3)rectx[i].emplace_back(n[i==2]);
    rep(i,3)recty[i].emplace_back(0);
    rep(i,3)recty[i].emplace_back(n[2-(i==0)]);
    rep(i,m){
        //cerr<<s[i]<<" "<<t[i]<<endl;
        if(s[i]==t[i]){
            if(a[i]>b[i])swap(a[i],b[i]);
            ng[s[i]][a[i]]++;
            ng[t[i]][b[i]]--;
        }else{
            if(s[i]>t[i]){
                swap(s[i],t[i]);
                swap(a[i],b[i]);
            }
            int idx=s[i]+t[i]-1;
            rectx[idx].emplace_back(a[i]);
            recty[idx].emplace_back(b[i]);
            judgex[idx].emplace_back(a[i],i);
            judgey[idx].emplace_back(b[i],i);
        }
    }
    rep(i,3)rep(j,n[i])ng[i][j+1]+=ng[i][j];
    rep(i,3)rep(j,n[i])ok[i][j+1]=(ng[i][j]==0);
    rep(i,3)rep(j,n[i])ok[i][j+1]+=ok[i][j];
    rep(i,3)sort(all(rectx[i]));
    rep(i,3)sort(all(recty[i]));
    rep(i,3)sort(all(judgex[i]));
    rep(i,3)sort(all(judgey[i]));
    rep(i,3)ok2[i].resize(rectx[i].size()-1,0);
    rep(i,3){
        ok2[i][0]=1;
        map<lint,lint>tmp;
        rep(j,judgex[i].size()){
            tmp[judgex[i][j].second]++;
            tmp[judgey[i][j].second]--;
            if(tmp[judgex[i][j].second]==0)tmp.erase(judgex[i][j].second);
            if(tmp[judgey[i][j].second]==0)tmp.erase(judgey[i][j].second);
            if(tmp.size()==0){
                ok2[i][j+1]=1;
            }
            //cerr<<tmp.size()<<endl;
        }
    }
    //rep(i,3)cout<<rectx[i].size()<<" \n"[i==2];
    // rep(i,3)assert(rectx[i].size()==recty[i].size());
    //rep(i,3)rep(j,ok[i].size()){
    //    cout<<ok[i][j]<<" \n"[j==ok[i].size()-1];
    //}
    //cout<<endl;;
    //rep(i,3)rep(j,ok2[i].size()){
    //    cout<<ok2[i][j]<<" \n"[j==ok2[i].size()-1];
    //}
    int id1=0,id2=0;
    lint ans=0;
    pre();
    rep(i,n[0]){
        if(ng[0][i])continue;
        while(i>=rectx[0][id1+1])id1++;
        while(i>=rectx[1][id2+1])id2++;
        if(!ok2[0][id1]||!ok2[1][id2])continue;
        ans+=getsum(recty[0][id1],recty[0][id1+1],recty[1][id2],recty[1][id2+1]);
        //cerr<<ans<<endl;
    }
    cout<<ans<<endl;
/**/}