#include <fstream>
#include <vector>
#include <algorithm>
#include <stack>
using namespace std;
using pii = pair<int,int>;

ifstream cin("atac.in");
ofstream cout("atac.out");

const int MAX = 32e4+1;

struct muchie{

    int x , y , c;
};

bool crit( muchie r , muchie l){

    return r.c > l.c;
}

vector <muchie> edges;

int qx , qy , a , b , c , d , n , m , p;

struct DSU{

    int h[MAX] , t[MAX] , val[MAX];

    void init(){

        for(int i = 1 ; i <= n ; i++){

            h[i] = t[i] = val[i] = 0;
        }
    }

    int findc( int x ){

        while(t[x]) x = t[x];
        return x;
    }

    void unionp( int x , int y , int c){

        x = findc(x);
        y = findc(y);
        if(x == y) return;
        if(h[x] == h[y]){
            t[y] = x;
            val[y] = c;
            h[x]++;
        }else{
            if(h[x]<h[y])swap(x,y);
            t[y] = x;
            val[y] = c;
        }
    }

    int value( int x , int y ){

        vector <int> xs;
        vector <int> ys;

        while(x){
            xs.push_back(x);
            x=t[x];
        }

        while(y){
            ys.push_back(y);
            y=t[y];
        }

        reverse(xs.begin(),xs.end());
        reverse(ys.begin(),ys.end());

        int i;

        for(i = 0 ; i < (int)xs.size() && i < (int)ys.size() && xs[i]==ys[i]; i++);

        if(i == (int)xs.size()){

            return val[ys[i]];

        }else if( i == (int)ys.size()){

            return val[xs[i]];

        }else return min(val[xs[i]],val[ys[i]]);
    }
}uf;

signed main(){

    cin >> n >> m >> p;

    int x , y;

    for(int i = 2 ; i <= n ; i++){

        cin >> x >> y;
        edges.push_back({x,i,y});
    }

    sort(edges.begin(),edges.end(),crit);

    for(auto it : edges){

        uf.unionp(it.x,it.y,it.c);
    }

    cin >> qx >> qy >> a >> b >> c >> d;

    for(int i = 1 ; i <= m ; i++){

        int val = uf.value(qx,qy);
        if(m - (i-1)  <= p){

            cout << val;
        }
        qx = (qx*a+qy*b)%n + 1;
        qy = (qy*c+val*d)%n + 1;
    }

    return 0;
}