#include<bits/stdc++.h>
#define FILE "read"
#define eps 1e-10
using namespace std;
struct node{int x,y;}e[50010];
double a[305][305];
int n,m,p,q,d[305];
inline int read(){
int x=0,f=1; char ch=getchar();
while(!isdigit(ch)) {if(ch=='-') f=-1; ch=getchar();}
while(isdigit(ch)) {x=x*10+ch-'0'; ch=getchar();}
return x*f;
}
void init(){
n=read(); m=read(); p=read(); q=read();
double rate=(double)p/q;
for(int i=1;i<=m;++i){
e[i].x=read(); e[i].y=read();
d[e[i].x]++; d[e[i].y]++;
}
for(int i=1;i<=m;++i){
a[e[i].x][e[i].y]+=(rate-1)/d[e[i].y];
a[e[i].y][e[i].x]+=(rate-1)/d[e[i].x];
}
for(int i=1;i<=n;++i) a[i][i]+=1.0;
a[1][n+1]=rate;
}
bool gauss(){
int now=1;
for(int i=1,temp;i<=n;++i){
for(temp=now;temp<=n;++temp) if(fabs(a[temp][i])>eps) break;
if(temp>n) continue;
if(temp!=now) swap(a[temp],a[now]);
double t=a[now][i];
for(int j=i+1;j<=n+1;++j) a[now][j]/=t;
for(int j=1;j<=n;++j)if(j!=now){
double t=a[j][i];
for(int k=i+1;k<=n+1;++k) a[j][k]-=t*a[now][k];
}
++now;
}
for(int i=now;i<=n;++i) if(fabs(a[i][n+1])>eps) return 0;
return 1;
}
void putout(){
for(int i=1;i<=n;++i) printf("%.9lf\n",a[i][n+1]);
}
int main(){
freopen(FILE".in","r",stdin);
freopen(FILE".out","w",stdout);
init(); gauss(); putout();
return 0;
}