#include<cstdio>

#include<iostream>

#include<cmath>

#define R register int

#define db long double

using namespace std;

const db eps=1E-;

const int N=;

db a[N][N],P;

int mp[N][N],r[N],n,m,p,q;

inline int g() {

    R ret=,fix=; register char ch; while(!isdigit(ch=getchar())) fix=ch=='-'?-:fix;

    do ret=ret*+(ch^); while(isdigit(ch=getchar())); return ret*fix;

}

inline bool ck0(const db& x) {return x<eps&&x>-eps;}

inline void Gauss(int n) {

    for(R i=;i<=n;++i) { R p=i;

        for(R j=i+;j<=n;++j) if(ck0(a[p][i])||fabs(a[p][i])<fabs(a[j][i])) p=j;

        if(p!=i) swap(a[p],a[i]);

        for(R j=i+;j<=n;++j) if(!ck0(a[j][i])) {

            register db t=a[j][i]/a[i][i];

            for(R k=;k<=n+;++k) a[j][k]-=t*a[i][k];

        }

    } for(R i=n;i>=;--i) {

        for(R j=n;j>i;--j) a[i][n+]-=a[i][j]*a[j][n+];

        a[i][n+]/=a[i][i];

    }

}

signed main() {

    n=g(),m=g(),p=g(),q=g(); P=(db)p/q;

    for(R i=,u,v;i<=m;++i) u=g(),v=g(),mp[u][v]=mp[v][u]=,++r[u],++r[v];

    for(R i=;i<=n;++i) a[i][i]=;

    for(R i=;i<=n;++i) for(R j=;j<=n;++j) if(mp[i][j]) a[i][j]-=(1.0-P)/r[j];

    a[][n+]=; Gauss(n); for(R i=;i<=n;++i) printf("%.9Lf\n",a[i][n+]*P);

}