#include <bits/stdc++.h> 
using namespace std;
const int N=310;
const double eps=1e-9;
int n,m;double p,q;
bool mp[N][N];
int d[N];
double a[N][N],x[N];
void gauss()
{
    for(int i=1;i<=n;++i)
    {
        int r=i;for(int j=i+1;j<=n;++j)if(fabs(a[r][i])<fabs(a[j][i]))r=j;
        if(r!=i)swap(a[i],a[r]);
        
        for(int j=1;j<=n;++j)if(j!=i)
        {
            double bs=a[j][i]/a[i][i];
            for(int k=i;k<=n+1;++k)a[j][k]-=a[i][k]*bs;
        }
    }
    for(int i=1;i<=n;++i)x[i]=a[i][n+1]/a[i][i];
	for(int i=1;i<=n;i++)printf("%.9lf\n",x[i]);
}
int main()
{
    scanf("%d%d%lf%lf",&n,&m,&p,&q);
    memset(mp,0,sizeof(mp));
    memset(d,0,sizeof(d));
    for(int i=1,x,y;i<=m;i++)
    {
        scanf("%d%d",&x,&y);
        mp[x][y]=mp[y][x]=True;
        d[x]++;d[y]++;
    }
    memset(a,0,sizeof(a));
    a[1][n+1]=p/q;
    for(int i=1;i<=n;i++)
    {
        a[i][i]=1;
        for(int j=1;j<=n;j++)
            if(mp[i][j])
                a[i][j]=-(1.0-p/q)/d[j];
    }
    gauss();
    return 0;
}

#include<bits/stdc++.h> 
using namespace std;
const int N=310;
const double eps=1e-9;
int n,m;double p,q;
bool mp[N][N];
int d[N];
double a[N][N],x[N];
void gauss()
{
    for(int i=1;i<=n;++i)
    {
        int r=i;for(int j=i+1;j<=n;++j)if(fabs(a[r][i])<fabs(a[j][i]))r=j;
        if(r!=i)swap(a[i],a[r]);
        
        for(int j=1;j<=n;++j)if(j!=i)
        {
            double bs=a[j][i]/a[i][i];
            for(int k=i;k<=n+1;++k)a[j][k]-=a[i][k]*bs;
        }
    }
    for(int i=1;i<=n;++i)x[i]=a[i][n+1]/a[i][i];
	for(int i=1;i<=n;i++)printf("%.9lf\n",x[i]);
}
int main()
{
    scanf("%d%d%lf%lf",&n,&m,&p,&q);
    memset(mp,0,sizeof(mp));
    memset(d,0,sizeof(d));
    for(int i=1,x,y;i<=m;i++)
    {
        scanf("%d%d",&x,&y);
        mp[x][y]=mp[y][x]=True;
        d[x]++;d[y]++;
    }
    memset(a,0,sizeof(a));
    a[1][n+1]=p/q;
    for(int i=1;i<=n;i++)
    {
        a[i][i]=1;
        for(int j=1;j<=n;j++)
            if(mp[i][j])
                a[i][j]=-(1.0-p/q)/d[j];
    }
    gauss();
    return 0;
}